Error:
The game crashed whilst initializing game
Error: java.lang.NullPointerException: Cannot invoke "net.coderbot.iris.pipeline.PipelineManager.getPipeline()" because the return value of "net.coderbot.iris.Iris.getPipelineManager()" is null

We need the full log and really all the information that you should have filled out on the issue form

I also had this crash. First time reporting an issue let me know if you need any more info. Crash log should be attached if I did this right.
crash-2021-10-20_22.32.42-client.txt
IDK if it may help however the crash only started happening to me after I had updated some of my mods. I will attach a screenshot of them.

Updating each of those mods one by one seems to suggest its an issue with: ""An Origins Addon - Necromancer Origin". Something happens once that mod is updated to its latest version and even removing the mod doesnt fix the crash.

Same here, I experience this issue whenever I try to install more than 100 mods into my own modpack. It doesn't seem to have any correlation to which mod I'm removing/adding specifically, as long as the mod count is equal to or greater than 100, this issue will always occur.

crash-2021-10-26_14.20.13-client.txt

Seems to be happening with notify on and iris
JamCoreModding/Notify#5

the fact that random mods can be disabled to stop Iris from crash means this might be some sort of race condition. WHich is a massive pain to debug. oof

👋 Notify dev here. Is this caused by something I'm doing, or is it 'random'? Just so I can temporarily stop doing whatever I might be doing to stop the crashes?

same here:
---- Minecraft Crash Report ----
// My bad.

Time: 11/6/21, 6:18 AM
Description: Initializing game

java.lang.NullPointerException: Cannot invoke "net.coderbot.iris.pipeline.PipelineManager.getPipeline()" because the return value of "net.coderbot.iris.Iris.getPipelineManager()" is null
at Not Enough Crashes deobfuscated stack trace.(1.17.1+build.63)
at net.minecraft.client.render.GameRenderer.isPhase(GameRenderer:7315)
at net.minecraft.client.render.GameRenderer.handler$dma000$iris$overridePositionShader(GameRenderer:7045)
at net.minecraft.client.render.GameRenderer.getPositionShader(GameRenderer)
at com.mojang.blaze3d.systems.RenderSystem.setShader(RenderSystem:1137)
at net.minecraft.client.render.WorldRenderer.renderStars(WorldRenderer:645)
at net.minecraft.client.render.WorldRenderer.(WorldRenderer:278)
at net.minecraft.client.MinecraftClient.(MinecraftClient:573)
at net.minecraft.client.main.Main.main(Main:179)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:567)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:234)
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:153)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.class_757.isPhase(class_757.java:7315)
at net.minecraft.class_757.handler$dma000$iris$overridePositionShader(class_757.java:7045)
at net.minecraft.class_757.method_34539(class_757.java)
at com.mojang.blaze3d.systems.RenderSystem.setShader(RenderSystem.java:1137)
at net.minecraft.class_761.method_3293(class_761.java:645)
at net.minecraft.class_761.(class_761.java:278)
at net.minecraft.class_310.(class_310.java:573)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.main.Main.main(Main.java:179)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:234)
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:153)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)

I have this crash too
this is my log:
---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 11/10/21, 8:01 AM
Description: Initializing game

java.lang.NullPointerException: Cannot invoke "net.coderbot.iris.pipeline.PipelineManager.getPipeline()" because the return value of "net.coderbot.iris.Iris.getPipelineManager()" is null
at Not Enough Crashes deobfuscated stack trace.(1.17.1+build.63)
at net.minecraft.client.render.GameRenderer.isPhase(GameRenderer:5815)
at net.minecraft.client.render.GameRenderer.handler$ceg000$iris$overridePositionShader(GameRenderer:5545)
at net.minecraft.client.render.GameRenderer.getPositionShader(GameRenderer)
at com.mojang.blaze3d.systems.RenderSystem.setShader(RenderSystem:1137)
at net.minecraft.client.render.WorldRenderer.renderStars(WorldRenderer:645)
at net.minecraft.client.render.WorldRenderer.(WorldRenderer:278)
at net.minecraft.client.MinecraftClient.(MinecraftClient:573)
at net.minecraft.client.main.Main.main(Main:179)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:567)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:234)
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:153)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.class_757.isPhase(class_757.java:5815)
at net.minecraft.class_757.handler$ceg000$iris$overridePositionShader(class_757.java:5545)
at net.minecraft.class_757.method_34539(class_757.java)
at com.mojang.blaze3d.systems.RenderSystem.setShader(RenderSystem.java:1137)
at net.minecraft.class_761.method_3293(class_761.java:645)
at net.minecraft.class_761.(class_761.java:278)
at net.minecraft.class_310.(class_310.java:573)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.main.Main.main(Main.java:179)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:234)
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:153)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)

-- System Details --
Details:
Minecraft Version: 1.17.1
Minecraft Version ID: 1.17.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 16.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 84040792 bytes (80 MiB) / 553648128 bytes (528 MiB) up to 4294967296 bytes (4096 MiB)
CPUs: 32
Processor Vendor: AuthenticAMD
Processor Name: AMD Ryzen 9 5950X 16-Core Processor
Identifier: AuthenticAMD Family 25 Model 33 Stepping 0
Microarchitecture: Zen 3
Frequency (GHz): 3.40
Number of physical packages: 1
Number of physical CPUs: 16
Number of logical CPUs: 32
Graphics card #0 name: NVIDIA GeForce RTX 3060 Ti
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 4095.00
Graphics card #0 deviceId: 0x2486
Graphics card #0 versionInfo: DriverVersion=30.0.14.9649
Memory slot #0 capacity (MB): 16384.00
Memory slot #0 clockSpeed (GHz): 3.20
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 16384.00
Memory slot #1 clockSpeed (GHz): 3.20
Memory slot #1 type: DDR4
Memory slot #2 capacity (MB): 16384.00
Memory slot #2 clockSpeed (GHz): 3.20
Memory slot #2 type: DDR4
Memory slot #3 capacity (MB): 16384.00
Memory slot #3 clockSpeed (GHz): 3.20
Memory slot #3 type: DDR4
Virtual memory max (MB): 75188.23
Virtual memory used (MB): 25103.82
Swap memory total (MB): 9728.00
Swap memory used (MB): 0.00
JVM Flags: 5 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4096m -Xms256m -XX:PermSize=256m
Fabric Mods:
achievement_plates: Achievement Plates 1.4
additionalbars: Additional Bars 2.1.1
adorn: Adorn 2.3.1+1.17.1
advanced_runtime_resource_pack: Runtime Resource Pack 0.4.3
advancementinfo: AdvancementInfo 1.17.1-fabric0.36.1-1.2.1
advancementplaques: Advancement Plaques 1.4.2
animal_feeding_trough: Animal Feeding Trough 1.0.2
aqupdcaracal: Caracal mob 1.17-1.3.2
aqupdgrizzly: Grizzly Bear mob 1.17-1.2.0
architectury: Architectury 2.6.35
artifacts: Artifacts 5.0.2+fabric
bendy-lib: Bendy api 2.0.2
betterbeds: Better Beds 1.2.0
betterf3: BetterF3 1.1.5
betterpingdisplay: Better Ping Display 1.1
blockmeter: Block Meter ${version}
blue_endless_jankson: jankson 1.2.1
boatcontainer: BoatContainer 1.0.3
bosses_of_mass_destruction: Bosses of Mass Destruction (Beta) 1.3.2-1.17.1
bountiful: Bountiful 1.0.0
caelus: Caelus API 0.0.18-1.17.1
cardinal-components: Cardinal Components API 3.1.1
cardinal-components-base: Cardinal Components API (base) 3.1.1
cardinal-components-block: Cardinal Components API (blocks) 3.1.1
cardinal-components-chunk: Cardinal Components API (chunks) 3.1.1
cardinal-components-entity: Cardinal Components API (entities) 3.1.1
cardinal-components-item: Cardinal Components API (items) 3.1.1
cardinal-components-level: Cardinal Components API (world saves) 3.1.1
cardinal-components-scoreboard: Cardinal Components API (scoreboard) 3.1.1
cardinal-components-util: Cardinal Components API (utilities) 3.1.1
cardinal-components-world: Cardinal Components API (worlds) 3.1.1
carrier: Carrier 1.8.1
charmonium: Charmonium 3.3.0
cloth-api: Cloth API 2.0.54
cloth-basic-math: Cloth Basic Math 0.5.1
cloth-client-events-v0: Cloth Client Events v0 2.0.54
cloth-common-events-v1: Cloth Common Events v1 2.0.54
cloth-config2: Cloth Config v5 5.0.38
cloth-datagen-api-v1: Cloth Datagen v1 2.0.54
cloth-scissors-api-v1: Cloth Scissors API v1 2.0.54
cloth-utils-v1: Cloth Utils v1 2.0.54
com_electronwill_night-config_core: core 3.6.2
com_electronwill_night-config_toml: toml 3.6.2
com_moandjiezana_toml_toml4j: toml4j 0.7.2
com_velocitypowered_velocity-native: velocity-native 1.1.0-SNAPSHOT
comforts: Comforts 0.0.7-1.17.1
cool_elytra: Cool Elytra 1.3.0
croptopia: Croptopia 1.6.3
crowdin-translate: CrowdinTranslate 1.3+1.17
customizableelytra: Customizable Elytra 1.5.1-1.17
deathlog: DeathLog 0.2.2
decapitation: Decapitation 1.0.0
drinkbeer: Drink Beer 2.3
dual_riders: DualRiders 1.0.5
easiercrafting: EasierCrafting 1.17.1-fabric0.36.1-1.7
easiervillagertrading: EasierVillagerTrading 1.17.1-fabric0.36.1-1.5.4
eatinganimationid: Eating Animation 1.2
elytratrinket: Elytra Trinket 2.0.1-1.17
emotecraft: Emotecraft 2.0.9
enderscape: Enderscape 0.1.1
endless_cake: Endless Cake 1.0.0
enhancedcelestials: Enhanced Celestials 2.0.5
entityculling: EntityCulling-Fabric 1.3.3
expandability: ExpandAbility 4.0.2
explorerscompass: Explorer's Compass 1.17.1-2.0.2-fabric
extrarecords-core: Extrarecords Core 2.0.1
fabric: Fabric API 0.42.1+1.17
fabric-api-base: Fabric API Base 0.4.0+5847535018
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.3.1+5847535018
fabric-biome-api-v1: Fabric Biome API (v1) 3.2.2+5847535018
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.6+5847535018
fabric-command-api-v1: Fabric Command API (v1) 1.1.4+5847535018
fabric-commands-v0: Fabric Commands (v0) 0.2.3+5847535018
fabric-containers-v0: Fabric Containers (v0) 0.1.13+5847535018
fabric-content-registries-v0: Fabric Content Registries (v0) 0.3.1+5847535018
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.6+5847535018
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.0.13+5847535018
fabric-entity-events-v1: Fabric Entity Events (v1) 1.3.1+5847535018
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.11+5847535018
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.2+5847535018
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.8+5847535018
fabric-item-api-v1: Fabric Item API (v1) 1.2.5+5847535018
fabric-item-groups-v0: Fabric Item Groups (v0) 0.3.1+5847535018
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.5+5847535018
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.3+5847535018
fabric-language-kotlin: Fabric Language Kotlin 1.6.5+kotlin.1.5.31
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.4.5+5847535018
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.5+5847535018
fabric-mining-level-api-v1: Fabric Mining Level API (v1) 1.0.2+6d0fac4218
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.5+6d0fac4218
fabric-models-v0: Fabric Models (v0) 0.3.1+5847535018
fabric-networking-api-v1: Fabric Networking API (v1) 1.0.14+5847535018
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.12+5847535018
fabric-networking-v0: Fabric Networking (v0) 0.3.3+5847535018
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.10.11+6d0fac4218
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.5+6d0fac4218
fabric-particles-v1: Fabric Particles (v1) 0.2.5+5847535018
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.7.13+5847535018
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.4.5+5847535018
fabric-renderer-indigo: Fabric Renderer - Indigo 0.4.9+5847535018
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.6+6d0fac4218
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.6+5847535018
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.2.1+6d0fac4218
fabric-rendering-v0: Fabric Rendering (v0) 1.1.7+6d0fac4218
fabric-rendering-v1: Fabric Rendering (v1) 1.10.1+6d0fac4218
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.9+5847535018
fabric-screen-api-v1: Fabric Screen API (v1) 1.0.5+5847535018
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.9+5847535018
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.14+5847535018
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.2.2+5847535018
fabric-textures-v0: Fabric Textures (v0) 1.0.7+5847535018
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.3.1+eb76084f18
fabric-transfer-api-v1: Fabric Transfer API (v1) 1.5.1+6d0fac4218
fabricloader: Fabric Loader 0.11.7
ferritecore: FerriteCore 3.0.3
gammautils: Gamma Utils 1.4.3
gbfabrictools: GBfabrictools 1.3.4+1.17
geckolib3: Geckolib 3.0.21
gravestones: Simple Gravestones 0.5
graveyard: The Graveyard 2.0
guild: Guild 0.3.3
horsestatsvanilla: Horse Stats Vanilla 4.1.8
iceberg: Iceberg 1.0.23
inventorysorter: Inventory Sorter 1.8.0-1.17
invmove: InvMove 1.17-0.1.0
iris: Iris 1.1.2+build.9
jankson: Jankson 3.0.1+j1.2.0
java: OpenJDK 64-Bit Server VM 16
kambrik: Kambrik 1.1.0
krypton: Krypton 0.1.4
kyrptconfig: Kyrpt Config 1.2.1-1.17
lazydfu: LazyDFU 0.1.2
lchunkloader: Literally Chunk Loader 2.0.3
legendarytooltips: Legendary Tooltips 1.1.2
libcd: LibCapableData 3.0.3+1.16.3
libgui: LibGui 4.1.6+1.17.1
libninepatch: LibNinePatch 1.1.0
lightestlamp: Lightest Lamps 0.9.6
litematica: Litematica 0.0.0-dev.20210906.183617
logical_zoom: Logical Zoom 0.0.11
lovely_snails: Lovely Snails 1.0.3+1.17
maelstrom_library: Maelstrom Library 1.2.2-1.17.1
malilib: MaLiLib 0.10.0-dev.26
maptooltip: Map Tooltip 1.3.0
midnightlib: MidnightLib 0.2.6
minecraft: Minecraft 1.17.1
mm: Manningham Mills 2.3
modmenu: Mod Menu 2.0.14
morebannerfeatures: More Banner Features 1.0.7
moretotems: More Totems 2.8.0
multipart_entities: MultipartEntities 1.1.3-1.17.1
naturescompass: Nature's Compass 1.17.1-2.0.1-fabric
nears: Nears 1.1.2
notenoughcrashes: Not Enough Crashes 3.7.1+1.17.1
omega-config: OmegaConfig 1.0.8
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.5.31
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.5.31
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.5.31
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.5.31
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.5.2
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.5.2
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.3.0
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.3.0
oxidizelib: OxidizeLib 1.1.0
paintings: Paintings ++ 1.17.1-1.0.0.3
pandamc_concreteplus: Concrete plus 1.9
perorate: Perorate 1.2.0
perspectivemod: Perspective Mod Redux 0.0.5_01
phonos: Phonos 0.1.2+1.17
plushies: Plushie Mod 1.0
quickshulker: Quick Shulker 1.3.1-1.17
reinfbarrel: Reinforced Barrels 1.0.3
reinfchest: Reinforced Chests 1.0.3
reinfcore: Reinforced Core 1.1.0
reinfshulker: Reinforced Shulker Boxes 1.1.2
rocks: This Rocks! 1.5.1
roughlyenoughitems: Roughly Enough Items 6.1.327
rupee: Rupees 1.2.0
shulkerboxtooltip: Shulker Box Tooltip 3.0.3+1.17.1
shulkerutils: shulkerutils 1.0.4-1.17
skinnedlanterns: Skinned Lanterns 1.1.5
skyfymodclient: SkyfyModClient 1.0.0
smoothboot: Smooth Boot 1.16.5-1.6.0
sodium: Sodium 0.3.2+build.7
sodium-extra: Sodium Extra 0.3.5
somnus: Somnus API 0.0.13-1.17.1
sound_track: Sound-Track 1.0.4
spawnermod: Enhanced Mob Spawners 1.1.2
squirrels: Squirrels 1.2.0-1.17
starlight: Starlight 1.0.0+fabric.73f6d37
step-height-entity-attribute: Step Height Entity Attribute 1.0.0
strawdummy: Straw Dummy 1.5.0
team_reborn_energy: Energy 2.0.0-beta1
teenycoal: Teeny Coal 1.0.3-1.16.x-1.17.x-1.18.x
things: Things 0.2.6
third_person_maps: Third Person Maps 1.2.0
transportables: Transportables 1.0.6
trinkets: Trinkets 3.0.4
untitledduckmod: Untitled Duck Mod 0.3.0
upgradedechests: Upgraded Ender Chests 1.0.3-1.17
vanilla_degus: Vanilla Degus 1.2.3
veinmining: Vein Mining 0.0.11-1.17.1
weaponthrow: Weapon Throw 1.17.1-1.4
wie: Water Imbued Enchantment & Thunder Imbued Enchantment 1.0.1
xps: Xp Obelisk 0.2.0_for_1.17.x_Fabric
Launched Version: fabric-loader-0.11.7-1.17.1
Backend library: LWJGL version 3.2.2 build 10
Backend API: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2 GL version 3.2.0 NVIDIA 496.49, NVIDIA Corporation
Window size:
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
CPU: 32x AMD Ryzen 9 5950X 16-Core Processor
Suspected Mods: Fabric Loader (fabricloader)

I noticed that minecraft does not crash when I disable the "sodium extra" mod. But i remember two week ago, i could use both together (sodium extra, iris) and there was no crash

also, when i download sodium extra, sodium mod has been automatically download because sodium extra include it on dependence and i had to delete sodium manually.

Your sodium versions seem to be getting replaced with the official ones, which in many cases causes a crash like that. You’ll need to manually delete the sodium jar file from your mods folder.

i have now the same error but with adorn mod :(
i disabled adorn = work
i enabled adorn = pipeline error

ill keep you informed if i find a solution

Maybe this procedure can fix some problem

• all my modpack was broken -> i delete the "minecraftinstance.json" file and restart minecraft -> and fix some error

I did an export of my curseforge profile, maybe if you want you can import him and see the error https://drive.google.com/file/d/1nIR1fmpcundc-Di4twBSOPakRDPoyRk4/view?usp=sharing

This seems to have nothing to do with Notify or similar mods, but rather this seems to be yet another incompatibility issue with Not Enough Crashes. NEC lets the game continue initialization after a fatal entrypoint crash, and if Iris wasn't initialized before the entrypoint crash, Iris crashes trying to access state that in a SANE environment should ALWAYS BE INITIALIZED by the time LevelRenderer is getting constructed, but NEC breaks that.

I guess it sorta makes sense since it needs to show a custom error screen. Still incredibly annoying.

Just to be clear: If you are debugging an error like this, changing the mods you have loaded will randomly change the mod loading order, meaning that adding / removing unrelated mods can cause or disable the crash.

Interesting, maybe it would be easier to just add a breaks to the fabric.mod.json and not worry about it :yeef:? Most people are going to choose iris over not enough crashes if they have to get rid of one of them anyways....

Should be addressed by e7ecc6a