A clear and concise description of what the bug is.
crash on multi-modded Minecraft.
When the experimental screen appears at that time before the mod screen appears the Minecraft crashes
The error is seen as a 'permgen' error and I see the future pack was responsible for this crash as shown in the future pack generation error

To Reproduce
Steps to reproduce the behavior:

1. create a new world and exit
2. then play the same world that you had played
3. The game crashes
4. See the crash log and game log
5. Scroll down to 'world loading event'
6. See the error

Version
Minecraft Version:1.16.5
Forge Version:36.2.34
Futurepack Version: 7008

If needed I will send the logs

yes please attach the crashreport & logs.

I will send this day the crash
Can't send a log because it is too long

The crash report says that it's rendering a GUI error

Crash report

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

Time: 7/3/23 6:50 PM
Description: Rendering screen

java.lang.NoClassDefFoundError: Could not initialize class futurepack.client.CreditsManager
at futurepack.common.gui.GuiFPWorldLoading.getTrimmedLines(GuiFPWorldLoading.java:55) ~[?:1.16.5-31.3.7008] {re:classloading}
at futurepack.common.gui.GuiFPWorldLoading.func_230430_a_(GuiFPWorldLoading.java:106) ~[?:1.16.5-31.3.7008] {re:classloading}
at net.minecraftforge.client.ForgeHooksClient.drawScreenInternal(ForgeHooksClient.java:363) ~[?:?] {re:classloading}
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:356) ~[?:?] {re:classloading}
at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:492) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:977) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:magnesium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:dynamiclightsreforged.mixins.json:MinecraftClientMixin,pl:mixin:APP:rubidium.mixins.json:features.gui.fast_fps_pie.MixinMinecraftClient,pl:mixin:APP:rubidium.mixins.json:features.options.MixinMinecraftClient,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:magnesium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:dynamiclightsreforged.mixins.json:MinecraftClientMixin,pl:mixin:APP:rubidium.mixins.json:features.gui.fast_fps_pie.MixinMinecraftClient,pl:mixin:APP:rubidium.mixins.json:features.options.MixinMinecraftClient,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) [?:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:37) [forge-1.16.5-36.2.39.jar:36.2] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$464/1220813917.call(Unknown Source) [forge-1.16.5-36.2.39.jar:36.2] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?] {}

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

-- Head --
Thread: Render thread
Stacktrace:
at futurepack.common.gui.GuiFPWorldLoading.getTrimmedLines(GuiFPWorldLoading.java:55) ~[?:1.16.5-31.3.7008] {re:classloading}
at futurepack.common.gui.GuiFPWorldLoading.func_230430_a_(GuiFPWorldLoading.java:106) ~[?:1.16.5-31.3.7008] {re:classloading}
at net.minecraftforge.client.ForgeHooksClient.drawScreenInternal(ForgeHooksClient.java:363) ~[?:?] {re:classloading}
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:356) ~[?:?] {re:classloading}
-- Screen render details --
Details:
Screen name: futurepack.common.gui.GuiFPWorldLoading
Mouse location: Scaled: (349, 240). Absolute: (1048.000000, 720.000000)
Screen size: Scaled: (640, 339). Absolute: (1920, 1017). Scale factor of 3.000000
Stacktrace:
at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:492) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:977) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:magnesium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:dynamiclightsreforged.mixins.json:MinecraftClientMixin,pl:mixin:APP:rubidium.mixins.json:features.gui.fast_fps_pie.MixinMinecraftClient,pl:mixin:APP:rubidium.mixins.json:features.options.MixinMinecraftClient,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:magnesium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:dynamiclightsreforged.mixins.json:MinecraftClientMixin,pl:mixin:APP:rubidium.mixins.json:features.gui.fast_fps_pie.MixinMinecraftClient,pl:mixin:APP:rubidium.mixins.json:features.options.MixinMinecraftClient,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) [?:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:37) [forge-1.16.5-36.2.39.jar:36.2] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$464/1220813917.call(Unknown Source) [forge-1.16.5-36.2.39.jar:36.2] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?] {}

-- System Details --
Details:
Minecraft Version: 1.16.5
Minecraft Version ID: 1.16.5
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 4398716352 bytes (4194 MB) / 5133828096 bytes (4896 MB) up to 8489271296 bytes (8096 MB)
CPUs: 4
JVM Flags: 10 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -XX:+IgnoreUnrecognizedVMOptions -Xmx8077M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
ModLauncher: 8.1.3+8.1.3+main-8.1.x.c94d18ec
ModLauncher launch target: fmlclient
ModLauncher naming: srg
ModLauncher services:
/mixin-0.8.4.jar mixin PLUGINSERVICE
/eventbus-4.0.0.jar eventbus PLUGINSERVICE
/forge-1.16.5-36.2.39.jar object_holder_definalize PLUGINSERVICE
/forge-1.16.5-36.2.39.jar runtime_enum_extender PLUGINSERVICE
/accesstransformers-3.0.1.jar accesstransformer PLUGINSERVICE
/forge-1.16.5-36.2.39.jar capability_inject_definalize PLUGINSERVICE
/forge-1.16.5-36.2.39.jar runtimedistcleaner PLUGINSERVICE
/mixin-0.8.4.jar mixin TRANSFORMATIONSERVICE
/forge-1.16.5-36.2.39.jar fml TRANSFORMATIONSERVICE
FML: 36.2
Forge: net.minecraftforge:36.2.39
FML Language Providers:
[email protected]
minecraft@1
Mod List:
forge-1.16.5-36.2.39-client.jar |Minecraft |minecraft |1.16.5 |DONE |Manifest: NOSIGNATURE
magnesium_extras-mc1.16.5_v1.4.0.jar |Magnesium Extras |magnesium_extras |mc1.16.5_v1.4.0 |DONE |Manifest: NOSIGNATURE
dynamiclightsreforged-mc1.16.5_v1.0.1.jar |Dynamic Lights Reforged |dynamiclightsreforged |mc1.16.5_v1.0.1 |DONE |Manifest: NOSIGNATURE
forge-1.16.5-36.2.39-universal.jar |Forge |forge |36.2.39 |DONE |Manifest: 22:af:21:d8:19:82:7f:93:94:fe:2b:ac:b7:e4:41:57:68:39:87:b1:a7:5c:c6:44:f9:25:74:21:14:f5:0d:90
rubidium-0.2.10.jar |Rubidium |rubidium |0.2.10 |DONE |Manifest: NOSIGNATURE
veinmining-forge-1.16.5-0.17.jar |Vein Mining |veinmining |1.16.5-0.17 |DONE |Manifest: NOSIGNATURE
Futurepack-1.16.5-31.3.7008.jar |Futurepack |futurepack |31.3.7008 |DONE |Manifest: 78:ee:c7:a4:2b:54:18:c6:71:6a:84:82:fa:d9:98:5a:a8:33:83:96:b1:4b:e6:1a:c9:56:58:d7:e8:92:1d:63
sulfuric-1.1.jar |Sulfuric |sulfuric |1.0 |DONE |Manifest: NOSIGNATURE
ferritecore-2.1.0-forge.jar |Ferrite Core |ferritecore |2.1.0 |DONE |Manifest: 41:ce:50:66:d1:a0:05:ce:a1:0e:02:85:9b:46:64:e0:bf:2e:cf:60:30:9a:fe:0c:27:e0:63:66:9a:84:ce:8a
Clumps-6.0.0.28.jar |Clumps |clumps |6.0.0.28 |DONE |Manifest: NOSIGNATURE
RoadRunner-mc1.16.5-1.4.1.jar |Meep Meep! (Road Runner) |roadrunner |1.4.1 |DONE |Manifest: NOSIGNATURE
jei-1.16.5-7.7.1.152.jar |Just Enough Items |jei |7.7.1.152 |DONE |Manifest: NOSIGNATURE
Crash Report UUID: 9b0099e1-dcd1-4af5-8b3f-baeea2b9e535
RoadRunner != Lithium: This instance was launched using RoadRunner, which is an unofficial Lithium fork! Please do not report bugs to them!
Launched Version: Better MC [FORGE] 1.16.5 v59.5
Backend library: LWJGL version 3.2.2 build 10
Backend API: Intel(R) HD Graphics 2000 GL version 3.1.0 - Build 9.17.10.4459, Intel
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'forge'
Type: Client (map_client.txt)
Graphics mode: fancy
Resource Packs: vanilla, mod_resources, quark:emote_resources (incompatible), file/Stay_True_1.16.zip, file/ST_NoBushyLeaves.zip (incompatible), file/Created Storage Network 1.1.zip, file/Ore Variants v2.4.zip (incompatible), file/Xaero's Minimap - Mod Icons.zip, file/Unity-1.16.X-Dark-0.7.1.zip, file/Vanilla Additions Dark GUI.zip (incompatible)
Current Language: English (US)
CPU: 4x Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz

yes please attach the crash report & logs.

Sorry for not responding because I forgot my password of GitHub I will send you the crash report and logs after few hours