Hi, the game won't start up when the mod is active. all mods are up to date. this is the full crash log:

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 8/28/21, 3:08 PM
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.38)
at net.minecraft.client.render.GameRenderer.isPhase(GameRenderer:6263)
at net.minecraft.client.render.GameRenderer.handler$cah000$iris$overridePositionShader(GameRenderer:6044)
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:6263)
at net.minecraft.class_757.handler$cah000$iris$overridePositionShader(class_757.java:6044)
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: 145641784 bytes (138 MiB) / 696254464 bytes (664 MiB) up to 5737807872 bytes (5472 MiB)
CPUs: 6
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i5-9600KF CPU @ 3.70GHz
Identifier: Intel64 Family 6 Model 158 Stepping 13
Microarchitecture: Coffee Lake
Frequency (GHz): 3.70
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 6
Graphics card #0 name: NVIDIA GeForce RTX 3070
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 4095.00
Graphics card #0 deviceId: 0x2484
Graphics card #0 versionInfo: DriverVersion=30.0.14.7168
Memory slot #0 capacity (MB): 8192.00
Memory slot #0 clockSpeed (GHz): 2.13
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 8192.00
Memory slot #1 clockSpeed (GHz): 2.13
Memory slot #1 type: DDR4
Virtual memory max (MB): 20012.42
Virtual memory used (MB): 11467.43
Swap memory total (MB): 3712.00
Swap memory used (MB): 178.81
JVM Flags: 5 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx5472m -Xms256m -XX:PermSize=256m
Fabric Mods:
advanced_runtime_resource_pack: Runtime Resource Pack 0.4.3
amecsapi: Amecs API 1.1.4+mc21w16a
antighost: AntiGhost 1.17.1-fabric0.36.1-1.1.4
appleskin: AppleSkin mc1.17-2.1.3
architectury: Architectury 2.4.26
atlantis: Atlantis 2021.7.18-1.17-1.9.0-fabric
autoconfig1u: Auto Config v1 Updated 3.2.2
betterthanmending: BetterThanMending 1.3.0
blue_endless_jankson: jankson 1.2.1
capes: Capes 1.2.1
cardinal-components-base: Cardinal Components API (base) 3.0.0
cardinal-components-entity: Cardinal Components API (entities) 3.0.0
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
coat: Coat 1.0.0-beta.9
com_moandjiezana_toml_toml4j: toml4j 0.7.2
controlling: Controlling For Fabric 1.1.2
crowdin-translate: CrowdinTranslate 1.3+1.17
cullleaves: Cull Leaves 2.2.0
customportalapi: Custom Portal Api 0.0.1-beta39-1.17
diggusmaximus: Diggus Maximus 1.4.5-1.17
dynamicfps: Dynamic FPS 2.0.5
enhancedblockentities: Enhanced Block Entities 0.4.1+1.17
entityculling: EntityCulling-Fabric 1.3.3
fabric: Fabric API 0.39.2+1.17
fabric-api-base: Fabric API Base 0.3.0+a02b446313
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.3.0+2f75c6ce18
fabric-biome-api-v1: Fabric Biome API (v1) 3.2.0+b06cb95b18
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.5+a02b446318
fabric-command-api-v1: Fabric Command API (v1) 1.1.3+5ab9934c18
fabric-commands-v0: Fabric Commands (v0) 0.2.2+92519afa18
fabric-containers-v0: Fabric Containers (v0) 0.1.12+a02b446318
fabric-content-registries-v0: Fabric Content Registries (v0) 0.3.0+211ddf9518
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.5+be9da31018
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.0.11+6cefd57718
fabric-entity-events-v1: Fabric Entity Events (v1) 1.2.2+62e33f4118
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.9+a722d8c018
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.1+92519afa18
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.7+6cefd57718
fabric-item-api-v1: Fabric Item API (v1) 1.2.4+a02b44633d
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.10+b7ab612118
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.4+a02b446318
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.2+36b77c3e18
fabric-language-kotlin: Fabric Language Kotlin 1.6.4+kotlin.1.5.30
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.4.4+a02b44633d
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.4+a02b446318
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.3+92519afa18
fabric-models-v0: Fabric Models (v0) 0.3.0+a02b446318
fabric-networking-api-v1: Fabric Networking API (v1) 1.0.13+2e8bd82f18
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.11+a02b446318
fabric-networking-v0: Fabric Networking (v0) 0.3.2+92519afa18
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.10.9+b7ab612118
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.3+a02b446318
fabric-particles-v1: Fabric Particles (v1) 0.2.4+a02b446318
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.7.10+e2961fee18
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.4.4+5f02c96918
fabric-renderer-indigo: Fabric Renderer - Indigo 0.4.8+a02b446318
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.1+b06cb95b18
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.5+a02b446313
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.13+a02b446318
fabric-rendering-v0: Fabric Rendering (v0) 1.1.2+92519afa18
fabric-rendering-v1: Fabric Rendering (v1) 1.8.0+b06cb95b18
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.8+a00e834b18
fabric-screen-api-v1: Fabric Screen API (v1) 1.0.4+155f865c18
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.8+a02b446318
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.13+5ab9934c18
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.2.1+b06cb95b18
fabric-textures-v0: Fabric Textures (v0) 1.0.6+a02b446318
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.12+b7ab61213d
fabric-transfer-api-v1: Fabric Transfer API (v1) 1.1.2+96bf6a7e18
fabricloader: Fabric Loader 0.11.6
fabrishot: Fabrishot 1.5.1
fallingtree: FallingTree 2.12.1
ferritecore: FerriteCore 3.0.3
geckolib3: Geckolib 3.0.13
gobber2: Gobber2 2.4.40
here-be-no-dragons: Here be no Dragons! 1.0.0
hydrogen: Hydrogen 0.3
illuminations: Illuminations 1.6.4
indium: Indium 1.0.0+mc1.17.1
iris: Iris 1.1.1
itemmodelfix: Item Model Fix 1.0.2+1.17
java: OpenJDK 64-Bit Server VM 16
kyrptconfig: Kytpt Config 1.1.10-1.17
lambdynlights: LambDynamicLights 2.0.2+1.17
lazydfu: LazyDFU 0.1.2
lithium: Lithium 0.7.4
minecraft: Minecraft 1.17.1
mining_dims: Mining Dimensions 1.1.11
mm: Manningham Mills 2.1
modmenu: Mod Menu 2.0.6
mostructures: Mo' Structures 1.3.0-pre1-1.17.1
mousewheelie: Mouse Wheelie 1.7.3-newconfig+mc1.17.1-pre1
nofade: No Fade 1.17-2.0.0
notenoughcrashes: Not Enough Crashes 3.3.1+1.17
omega-config: OmegaConfig 1.0.8
openworlds: Open Worlds 1.0.3
org_aperlambda_lambdajcommon: lambdajcommon 1.8.1
org_codehaus_groovy_groovy: groovy 3.0.8
org_codehaus_groovy_groovy-jsr223: groovy-jsr223 3.0.8
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.5.30
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.5.30
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.5.30
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.5.30
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.5.1
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.5.1
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.2.2
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.2.2
pugh_lib: Pugh Lib ${version}
pugh_tools: Pugh Tools ${version}
reeses-sodium-options: Reese's Sodium Options 1.1.2
roughlyenoughitems: Roughly Enough Items 6.0.268-alpha
simple_backpack: SimpleBackpack 1.1.18
slight-gui-modifications: 'Slight' GUI Modifications 2.0.1
smoothboot: Smooth Boot 1.16.5-1.6.0
sodium: Sodium 0.3.0+IRIS2
sodium-extra: Sodium Extra 0.3.3
spruceui: SpruceUI 3.2.0+1.17
things: Things 0.2.5
trinkets: Trinkets 3.0.2
tweed4_annotated: tweed4_annotated 1.0.0
tweed4_base: tweed4_base 1.0.0
tweed4_data: tweed4_data 1.0.0
tweed4_data_hjson: tweed4_data_hjson 1.0.0
tweed4_tailor_coat: tweed4_tailor_coat 1.0.0
tweed4_tailor_screen: tweed4_tailor_screen 1.0.0
voxelmap: VoxelMap 1.10.15
wi_zoom: WI Zoom 1.3-MC1.17.1
xaerominimap: Xaero's Minimap 21.16.0
yosbr: YOSBR 0.1.1
Launched Version: fabric-loader-0.11.6-1.17.1
Backend library: LWJGL version 3.2.2 build 10
Backend API: NVIDIA GeForce RTX 3070/PCIe/SSE2 GL version 3.2.0 NVIDIA 471.68, 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: 6x Intel(R) Core(TM) i5-9600KF CPU @ 3.70GHz
Suspected Mods: Fabric Loader (fabricloader)

This looks like a crash caused by Iris Shaders.

@kwpugh thanks! ill look into it later.