Legacy4J Version

Legacy4J 1.21.5 / most recent ver

Mod Loader Version

Fabric Loader 1.21.5 / most recent ver

Bug/Glitch Occurrence Context

[INCOMPATIBILITY] [FABRIC, 1.21.5, single player client, but also happens in the main menu too.]

this is a copypaste from serilum's github, as they told me to file a report here :))

downloaded collective as well as some other serilum mods today. collective clashes with mod menu in legacy4j and instantly crashes. i have tested this without legacy4j, and the mod menu works as intended. below is the crash report. any idea on a fix that doesn't require me to get rid of collective? :')
i use a nintendo switch pro controller, which scrolling down causes an instant crash. if i just scroll with a mouse, it will not crash instantly, but clicking on collective will cause a crash too.

Crash Report

posted below.

What happened wrong?

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 2025-05-08 11:00:51
Description: Rendering screen

com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Illegal character in path at index 57: https://github.com/Serilum/.issue-tracker/labels/Library: Collective
at knot//com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2085)
at knot//com.google.common.cache.LocalCache.get(LocalCache.java:4017)
at knot//com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4040)
at knot//com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4989)
at knot//com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4996)
at knot//wily.legacy.client.screen.ModsScreen.renderDefaultBackground(ModsScreen.java:153)
at knot//wily.legacy.client.screen.LegacyScreen.method_25420(LegacyScreen.java:35)
at knot//net.minecraft.class_437.method_25394(class_437.java:122)
at knot//net.minecraft.class_437.method_47413(class_437.java:113)
at knot//net.minecraft.class_757.mixinextras$bridge$method_47413$73(class_757.java)
at knot//net.minecraft.class_757.wrapOperation$ben000$fabric-screen-api-v1$onRenderScreen(class_757.java:915)
at knot//net.minecraft.class_757.method_3192(class_757.java:572)
at knot//net.minecraft.class_310.method_1523(class_310.java:1353)
at knot//net.minecraft.class_310.method_1514(class_310.java:936)
at knot//net.minecraft.client.main.Main.main(Main.java:265)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.IllegalArgumentException: Illegal character in path at index 57: https://github.com/Serilum/.issue-tracker/labels/Library: Collective
at java.base/java.net.URI.create(URI.java:932)
at knot//wily.legacy.client.screen.ModsScreen.urlClickEvent(ModsScreen.java:102)
at knot//wily.legacy.client.screen.ModsScreen$1.lambda$load$1(ModsScreen.java:92)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at knot//wily.legacy.client.screen.ModsScreen$1.load(ModsScreen.java:92)
at knot//wily.legacy.client.screen.ModsScreen$1.load(ModsScreen.java:78)
at knot//com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3574)
at knot//com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2316)
at knot//com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189)
at knot//com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079)
... 17 more
Caused by: java.net.URISyntaxException: Illegal character in path at index 57: https://github.com/Serilum/.issue-tracker/labels/Library: Collective
at java.base/java.net.URI$Parser.fail(URI.java:2995)
at java.base/java.net.URI$Parser.checkChars(URI.java:3166)
at java.base/java.net.URI$Parser.parseHierarchical(URI.java:3248)
at java.base/java.net.URI$Parser.parse(URI.java:3196)
at java.base/java.net.URI.(URI.java:645)
at java.base/java.net.URI.create(URI.java:930)
... 26 more

A detailed walkthrough of the error, its code path and all known details is as follows:
-- Head --
Thread: Render thread
Stacktrace:
at knot//com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2085)
at knot//com.google.common.cache.LocalCache.get(LocalCache.java:4017)
at knot//com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4040)
at knot//com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4989)
at knot//com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4996)
at knot//wily.legacy.client.screen.ModsScreen.renderDefaultBackground(ModsScreen.java:153)
at knot//wily.legacy.client.screen.LegacyScreen.method_25420(LegacyScreen.java:35)
at knot//net.minecraft.class_437.method_25394(class_437.java:122)
at knot//net.minecraft.class_437.method_47413(class_437.java:113)
at knot//net.minecraft.class_757.mixinextras$bridge$method_47413$73(class_757.java)
at knot//net.minecraft.class_757.wrapOperation$ben000$fabric-screen-api-v1$onRenderScreen(class_757.java:915)

-- Screen render details --
Details:
Screen name: wily.legacy.client.screen.ModsScreen
Mouse location: Scaled: (320.000000, 180.000000). Absolute: (2560.000000, 1440.000000)
Screen size: Scaled: (640, 360). Absolute: (5120, 2880). Scale factor of 8.000000
Stacktrace:
at knot//net.minecraft.class_757.method_3192(class_757.java:572)
at knot//net.minecraft.class_310.method_1523(class_310.java:1353)
at knot//net.minecraft.class_310.method_1514(class_310.java:936)
at knot//net.minecraft.client.main.Main.main(Main.java:265)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)

-- Uptime --
Details:
JVM uptime: 640.638s
Wall uptime: 627.812s
High-res time: 622.748s
Client ticks: 12117 ticks / 605.850s
Stacktrace:
at knot//net.minecraft.class_310.method_1587(class_310.java:2382)
at knot//net.minecraft.class_310.method_54580(class_310.java:1005)
at knot//net.minecraft.class_310.method_1514(class_310.java:957)
at knot//net.minecraft.client.main.Main.main(Main.java:265)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)

-- Last reload --
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: vanilla, fabric, almanac, ambientsounds, appleskin, betterstats, boatiview, chunky, cloth-config, creativecore, durabilitytooltip, entityculling, fabric-api, fabric-api-base, fabric-api-lookup-api-v1, fabric-biome-api-v1, fabric-block-api-v1, fabric-block-view-api-v2, fabric-blockrenderlayer-v1, fabric-client-tags-api-v1, fabric-command-api-v1, fabric-command-api-v2, fabric-commands-v0, fabric-content-registries-v0, fabric-convention-tags-v1, fabric-convention-tags-v2, fabric-crash-report-info-v1, fabric-data-attachment-api-v1, fabric-data-generation-api-v1, fabric-dimensions-v1, fabric-entity-events-v1, fabric-events-interaction-v0, fabric-game-rule-api-v1, fabric-item-api-v1, fabric-item-group-api-v1, fabric-key-binding-api-v1, fabric-keybindings-v0, fabric-language-kotlin, fabric-lifecycle-events-v1, fabric-loot-api-v2, fabric-loot-api-v3, fabric-message-api-v1, fabric-model-loading-api-v1, fabric-networking-api-v1, fabric-object-builder-api-v1, fabric-particles-v1, fabric-recipe-api-v1, fabric-registry-sync-v0, fabric-renderer-api-v1, fabric-renderer-indigo, fabric-rendering-data-attachment-v1, fabric-rendering-fluids-v1, fabric-rendering-v1, fabric-resource-conditions-api-v1, fabric-resource-loader-v0, fabric-screen-api-v1, fabric-screen-handler-api-v1, fabric-sound-api-v1, fabric-tag-api-v1, fabric-transfer-api-v1, fabric-transitive-access-wideners-v1, fabricloader, factory_api, inventorymanagement, legacy, letmedespawn, libipn, modmenu, placeholder-api, roughlyenoughitems, sereneseasons, silk-all, sodium, taxfreelevels, tcdcommons, team_reborn_energy, terrablender, veinminer, veinminer-client, worldplaytime, xaerominimap, xaeroworldmap, yet_another_config_lib_v3, zoomify, programmer_art, fabric-item-group-api-v1_programmer_art, legacy_programmer_art, modmenu_programmer_art, sodium_programmer_art, legacy:legacy_waters, legacy:legacy_resources

-- System Details --
Details:
Minecraft Version: 1.21.5
Minecraft Version ID: 1.21.5
Operating System: Windows 10 (amd64) version 10.0
Java Version: 21.0.3, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 723691272 bytes (690 MiB) / 2147483648 bytes (2048 MiB) up to 2147483648 bytes (2048 MiB)
CPUs: 6
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i5-8500 CPU @ 3.00GHz
Identifier: Intel64 Family 6 Model 158 Stepping 10
Microarchitecture: Coffee Lake
Frequency (GHz): 3.00
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 6
Graphics card #0 name: Radeon Pro 570X
Graphics card #0 vendor: Advanced Micro Devices, Inc.
Graphics card #0 VRAM (MiB): 4096.00
Graphics card #0 deviceId: VideoController1
Graphics card #0 versionInfo: 27.20.14540.15002
Memory slot #0 capacity (MiB): 4096.00
Memory slot #0 clockSpeed (GHz): 2.67
Memory slot #0 type: DDR4
Memory slot #1 capacity (MiB): 4096.00
Memory slot #1 clockSpeed (GHz): 2.67
Memory slot #1 type: DDR4
Virtual memory max (MiB): 17286.17
Virtual memory used (MiB): 12435.89
Swap memory total (MiB): 9216.00
Swap memory used (MiB): 396.06
Space in storage for jna.tmpdir (MiB): available: 47850.37, total: 144420.00
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 47850.37, total: 144420.00
Space in storage for io.netty.native.workdir (MiB): available: 47850.37, total: 144420.00
Space in storage for java.io.tmpdir (MiB): available: 47850.37, total: 144420.00
Space in storage for workdir (MiB): available: 47850.37, total: 144420.00
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
almanac: Almanac 1.4.5
ambientsounds: AmbientSounds 6.1.9
appleskin: AppleSkin 3.0.6+mc1.21.5
architectury: Architectury 16.1.4
betterstats: Better Statistics Screen 3.13.9+fabric-1.21.5
biomespawnpoint: Biome Spawn Point 2.4
boatiview: Boat Item View 0.0.6
chunky: Chunky 1.4.36
cloth-config: Cloth Config v17 18.0.145
cloth-basic-math: cloth-basic-math 0.6.1
clumps: Clumps 23.0.0.1
collective: Collective 8.3
creativecore: CreativeCore 2.13.2
net_neoforged_bus: bus 7.2.0
durabilitytooltip: Durability Tooltip 1.1.5
entityculling: EntityCulling 1.7.4
fabric-api: Fabric API 0.121.0+1.21.5
fabric-api-base: Fabric API Base 0.4.62+73a52b4b49
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.95+86c3a9f149
fabric-biome-api-v1: Fabric Biome API (v1) 16.0.7+2dd063df49
fabric-block-api-v1: Fabric Block API (v1) 1.0.37+86c3a9f149
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.26+aa6d566c49
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 2.0.16+86c3a9f149
fabric-client-tags-api-v1: Fabric Client Tags 1.1.37+86c3a9f149
fabric-command-api-v1: Fabric Command API (v1) 1.2.70+f71b366f49
fabric-command-api-v2: Fabric Command API (v2) 2.2.49+73a52b4b49
fabric-commands-v0: Fabric Commands (v0) 0.2.87+df3654b349
fabric-content-registries-v0: Fabric Content Registries (v0) 10.0.12+3e6c1f7d49
fabric-convention-tags-v1: Fabric Convention Tags 2.1.29+7f945d5b49
fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.14.3+fca633a049
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.3.12+86c3a9f149
fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.7.0+9c0dd47249
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 22.3.4+fd2b524049
fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.17+3e6c1f7d49
fabric-entity-events-v1: Fabric Entity Events (v1) 2.0.25+27c1078f49
fabric-events-interaction-v0: Fabric Events Interaction (v0) 4.0.13+73a52b4b49
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.70+c327076a49
fabric-item-api-v1: Fabric Item API (v1) 11.3.2+2ccdb6ef49
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.2.8+3459fc6149
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.63+ecf51cdc49
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.61+df3654b349
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.5.13+5cbce67349
fabric-loot-api-v2: Fabric Loot API (v2) 3.0.47+3f89f5a549
fabric-loot-api-v3: Fabric Loot API (v3) 1.0.35+86c3a9f149
fabric-message-api-v1: Fabric Message API (v1) 6.0.33+86c3a9f149
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 5.2.0+c982b95149
fabric-networking-api-v1: Fabric Networking API (v1) 4.4.0+f3ffa98949
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 21.0.0+7b20cbb049
fabric-particles-v1: Fabric Particles (v1) 4.1.1+112e550e49
fabric-recipe-api-v1: Fabric Recipe API (v1) 8.1.6+052a85d049
fabric-registry-sync-v0: Fabric Registry Sync (v0) 6.1.20+b556383249
fabric-renderer-api-v1: Fabric Renderer API (v1) 6.0.2+c982b95149
fabric-renderer-indigo: Fabric Renderer - Indigo 3.0.3+3e6c1f7d49
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.64+73761d2e49
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.27+86c3a9f149
fabric-rendering-v1: Fabric Rendering (v1) 11.1.11+081cc04349
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 5.0.21+73a52b4b49
fabric-resource-loader-v0: Fabric Resource Loader (v0) 3.1.6+02ca679649
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.46+86c3a9f149
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.127+c327076a49
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.38+86c3a9f149
fabric-tag-api-v1: Fabric Tag API (v1) 1.0.16+ecf51cdc49
fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.23+7b20cbb049
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.3.17+f17a180c49
fabric-language-kotlin: Fabric Language Kotlin 1.13.2+kotlin.2.1.20
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 2.1.20
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 2.1.20
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 2.1.20
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 2.1.20
org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.27.0
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.10.1
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.10.1
org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.6.2
org_jetbrains_kotlinx_kotlinx-io-bytestring-jvm: kotlinx-io-bytestring-jvm 0.7.0
org_jetbrains_kotlinx_kotlinx-io-core-jvm: kotlinx-io-core-jvm 0.7.0
org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.8.0
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.8.0
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.8.0
fabricloader: Fabric Loader 0.16.14
mixinextras: MixinExtras 0.4.1
factory_api: Factory API 2.2.4
team_reborn_energy: Energy 4.1.0
ferritecore: FerriteCore 8.0.0
fishontheline: Fish On The Line 3.5
glitchcore: GlitchCore 2.5.0.1
com_electronwill_night-config_core: core 3.6.7
com_electronwill_night-config_toml: toml 3.6.7
net_jodah_typetools: typetools 0.6.3
grassseeds: Grass Seeds 3.4
healingcampfire: Healing Campfire 6.2
inventorymanagement: Inventory Management 1.6.0
inventorytotem: Inventory Totem 3.4
java: OpenJDK 64-Bit Server VM 21
legacy: Legacy4J 1.8.1
dev_isxander_libsdl4j: libsdl4j 3.1.9.075c033-66
letmedespawn: Let Me Despawn 1.5.1
libipn: libIPN 6.5.0
minecraft: Minecraft 1.21.5
modmenu: Mod Menu 14.0.0-rc.2
placeholder-api: Placeholder API 2.6.0+1.21.5
mr_remove_terralithintromessage: Remove Terralith Intro Message 1.1
nohostilesaroundcampfire: No Hostiles Around Campfire 7.2
passiveshield: Passive Shield 3.7
replantingcrops: Replanting Crops 5.5
roughlyenoughitems: Roughly Enough Items 19.0.806
error_notifier: Error Notifier 1.0.11
sereneseasons: SereneSeasons 10.4.0.1
silk-all: Silk (All modules) 1.11.1
silk-commands: Silk Commands 1.11.1
silk-core: Silk Core 1.11.1
silk-game: Silk Game 1.11.1
silk-igui: Silk Inventory GUI 1.11.1
silk-nbt: Silk NBT 1.11.1
silk-network: Silk Network 1.11.1
silk-persistence: Silk Persistence 1.11.1
sodium: Sodium 0.6.13+mc1.21.5
stackrefill: Stack Refill 4.7
supermartijn642configlib: SuperMartijn642's Config Lib 1.1.8
taxfreelevels: Tax Free Levels 1.4.10
tcdcommons: TCD Commons API 3.12.7+fabric-1.21.5
terrablender: TerraBlender 5.0.0.1
terralith: Terralith 2.5.9
veinminer: Veinminer 2.4.2
de_miraculixx_core_dev: core 2.4.2
veinminer-client: Veinminer Client 2.4.2
de_miraculixx_core: core 2.4.3
fabric-permissions-api-v0: fabric-permissions-api 0.3.3
worldplaytime: World Play Time 1.2.4
xaerominimap: Xaero's Minimap 25.2.5
xaeroworldmap: Xaero's World Map 1.39.8
yet_another_config_lib_v3: YetAnotherConfigLib 3.6.6+1.21.5-fabric
com_twelvemonkeys_common_common-image: common-image 3.12.0
com_twelvemonkeys_common_common-io: common-io 3.12.0
com_twelvemonkeys_common_common-lang: common-lang 3.12.0
com_twelvemonkeys_imageio_imageio-core: imageio-core 3.12.0
com_twelvemonkeys_imageio_imageio-metadata: imageio-metadata 3.12.0
com_twelvemonkeys_imageio_imageio-webp: imageio-webp 3.12.0
org_quiltmc_parsers_gson: gson 0.2.1
org_quiltmc_parsers_json: json 0.2.1
zoomify: Zoomify 2.14.2+1.21.3
com_akuleshov7_ktoml-core-jvm: ktoml-core-jvm 0.5.2
Launched Version: fabric-loader-0.16.14-1.21.5
Launcher name: minecraft-launcher
Backend library: LWJGL version 3.3.3-snapshot
Backend API: Radeon Pro 570X GL version 3.2.14761 Core Profile Forward-Compatible No Error Context FireGL 20.45.40.15 27.20.14540.15002, ATI Technologies Inc.
Window size: 5120x2880
GFLW Platform: win32
Render Extensions: GL_KHR_debug, GL_ARB_vertex_attrib_binding, GL_ARB_direct_state_access
GL debug messages:
Is Modded: Definitely; Client brand changed to 'fabric'
Universe: 400921fb54442d18
Type: Client (map_client.txt)
Graphics mode: fancy
Render Distance: 12/12 chunks
Resource Packs: vanilla, fabric, almanac, ambientsounds, appleskin (incompatible), betterstats, boatiview, chunky, cloth-config, creativecore, durabilitytooltip (incompatible), entityculling, fabric-api, fabric-api-base, fabric-api-lookup-api-v1, fabric-biome-api-v1, fabric-block-api-v1, fabric-block-view-api-v2, fabric-blockrenderlayer-v1, fabric-client-tags-api-v1, fabric-command-api-v1, fabric-command-api-v2, fabric-commands-v0, fabric-content-registries-v0, fabric-convention-tags-v1, fabric-convention-tags-v2, fabric-crash-report-info-v1, fabric-data-attachment-api-v1, fabric-data-generation-api-v1, fabric-dimensions-v1, fabric-entity-events-v1, fabric-events-interaction-v0, fabric-game-rule-api-v1, fabric-item-api-v1, fabric-item-group-api-v1, fabric-key-binding-api-v1, fabric-keybindings-v0, fabric-language-kotlin, fabric-lifecycle-events-v1, fabric-loot-api-v2, fabric-loot-api-v3, fabric-message-api-v1, fabric-model-loading-api-v1, fabric-networking-api-v1, fabric-object-builder-api-v1, fabric-particles-v1, fabric-recipe-api-v1, fabric-registry-sync-v0, fabric-renderer-api-v1, fabric-renderer-indigo, fabric-rendering-data-attachment-v1, fabric-rendering-fluids-v1, fabric-rendering-v1, fabric-resource-conditions-api-v1, fabric-resource-loader-v0, fabric-screen-api-v1, fabric-screen-handler-api-v1, fabric-sound-api-v1, fabric-tag-api-v1, fabric-transfer-api-v1, fabric-transitive-access-wideners-v1, fabricloader, factory_api (incompatible), inventorymanagement, legacy (incompatible), letmedespawn, libipn, modmenu, placeholder-api, roughlyenoughitems, sereneseasons (incompatible), silk-all, sodium, taxfreelevels, tcdcommons, team_reborn_energy, terrablender (incompatible), veinminer, veinminer-client, worldplaytime, xaerominimap (incompatible), xaeroworldmap (incompatible), yet_another_config_lib_v3 (incompatible), zoomify, programmer_art, fabric-item-group-api-v1_programmer_art, legacy_programmer_art, modmenu_programmer_art, sodium_programmer_art, legacy:legacy_waters, legacy:legacy_resources
Current Language: en_us
Locale: en_GB
System encoding: Cp1252
File encoding: UTF-8
CPU: 6x Intel(R) Core(TM) i5-8500 CPU @ 3.00GHz

They're using an invalid URL for the issue tracker. (at least in code)
I'll fix this, so invalid URLs can be used

thankyou for your work!

you know i don't think this should be closed. still an issue as of version 1.8.5 for 1.21.8.

I am sorry in advance if this was already fixed. Hope this helps.

The issue is
Caused by: java.net.URISyntaxException: Illegal character in path at index 57: https://github.com/Serilum/.issue-tracker/labels/Library: Collective, because the link is not written correctly in the fabric.mod.json file inside of collective mod jar, at

"contact": {
    "homepage": "https://curseforge.com/minecraft/mc-mods/collective",
    "sources": "https://github.com/Serilum/Collective",
    "issues": "https://github.com/Serilum/.issue-tracker/labels/Library: Collective"
}

more exactly the "issues" URL.

The space and : must be escaped, as well as double quotes in URL. Changing it to "https://github.com/Serilum/.issue-tracker/labels/%22Library%3A%20Collective%22" solves the crashing and also points to the issue tracker with the library in the search bar.

Serilum/.issue-tracker#3100 (comment)