When I use the palette the GUI opens up, game freezes up for a second, and then it crashes.

---- Minecraft Crash Report ----
// Don't do that.

Time: 9/19/21 6:10 PM
Description: mouseDragged event handler

java.lang.IllegalAccessError: tried to access method net.minecraft.client.gui.screen.inventory.ContainerScreen.func_195360_a(DD)Lnet/minecraft/inventory/container/Slot; from class net.nicguzzo.wands.PaletteScreen
at net.nicguzzo.wands.PaletteScreen.func_231045_a_(PaletteScreen.java:137) ~[?:?] {re:classloading}
at net.minecraft.client.MouseHelper.lambda$onMove$11(MouseHelper.java:214) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper$$Lambda$5913/1725392569.run(Unknown Source) ~[?:?] {}
at net.minecraft.client.gui.screen.Screen.func_231153_a_(Screen.java:427) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper.func_198022_b(MouseHelper.java:212) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper.func_228033_f_(MouseHelper.java:171) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minec062353

raft.client.MouseHelper$$Lambda$3963/789367604.run(Unknown Source) ~[?:?] {}
at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(SourceFile:94) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.client.MouseHelper.func_228032_e_(MouseHelper.java:170) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper$$Lambda$3554/144486215.invoke(Unknown Source) ~[?:?] {}
at org.lwjgl.glfw.GLFWCursorPosCallbackI.callback(GLFWCursorPosCallbackI.java:37) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.2.2.jar:build 10] {}
at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:102) ~[?:?] {re:classloading}
at net.minecraft.client.MainWindow.func_227802_e_(MainWindow.java:305) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:996) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) [?:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.1.0.jar:36.1] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$447/803768841.call(Unknown Source) [forge-1.16.5-36.1.0.jar:36.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}

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

-- Head --
Thread: Render thread
Stacktrace:
at net.nicguzzo.wands.PaletteScreen.func_231045_a_(PaletteScreen.java:137) ~[?:?] {re:classloading}
at net.minecraft.client.MouseHelper.lambda$onMove$11(MouseHelper.java:214) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper$$Lambda$5913/1725392569.run(Unknown Source) ~[?:?] {}
-- Affected screen --
Details:
Screen name: net.nicguzzo.wands.PaletteScreen
Stacktrace:
at net.minecraft.client.gui.screen.Screen.func_231153_a_(Screen.java:427) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper.func_198022_b(MouseHelper.java:212) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper.func_228033_f_(MouseHelper.java:171) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper$$Lambda$3963/789367604.run(Unknown Source) ~[?:?] {}
at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(SourceFile:94) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.client.MouseHelper.func_228032_e_(MouseHelper.java:170) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.MouseHelper$$Lambda$3554/144486215.invoke(Unknown Source) ~[?:?] {}
at org.lwjgl.glfw.GLFWCursorPosCallbackI.callback(GLFWCursorPosCallbackI.java:37) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.2.2.jar:build 10] {}
at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:102) ~[?:?] {re:classloading}

-- Affected level --
Details:
All players: 1 total; [ClientPlayerEntity['LilChocolateNeko'/1, l='ClientLevel', x=-3.76, y=101.83, z=33.25]]
Chunk stats: Client Chunk Cache: 841, 550
Level dimension: minecraft:overworld
Level spawn location: World: (8,55,8), Chunk: (at 8,3,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 47082 game time, 4256 day time
Server brand: forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.world.ClientWorld.func_72914_a(ClientWorld.java:447) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:architectury.mixins.json:MixinClientLevel,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2029) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:623) [?:?] {re:classloading,pl:accesstransformer:B,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:51) [forge-1.16.5-36.1.0.jar:36.1] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$447/803768841.call(Unknown Source) [forge-1.16.5-36.1.0.jar:36.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}

-- System Details --
Details:
Minecraft Version: 1.16.5
Minecraft Version ID: 1.16.5
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1358390752 bytes (1295 MB) / 1979711488 bytes (1888 MB) up to 2147483648 bytes (2048 MB)
CPUs: 4
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
ModLauncher: 8.0.9+86+master.3cf110c
ModLauncher launch target: fmlclient
ModLauncher naming: srg
ModLauncher services:
/mixin-0.8.2.jar mixin PLUGINSERVICE
/eventbus-4.0.0.jar eventbus PLUGINSERVICE
/forge-1.16.5-36.1.0.jar object_holder_definalize PLUGINSERVICE
/forge-1.16.5-36.1.0.jar runtime_enum_extender PLUGINSERVICE
/accesstransformers-3.0.1.jar accesstransformer PLUGINSERVICE
/forge-1.16.5-36.1.0.jar capability_inject_definalize PLUGINSERVICE
/forge-1.16.5-36.1.0.jar runtimedistcleaner PLUGINSERVICE
/mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE
/forge-1.16.5-36.1.0.jar fml TRANSFORMATIONSERVICE
FML: 36.1
Forge: net.minecraftforge:36.1.0
FML Language Providers:
[email protected]
minecraft@1
Mod List:
forge-1.16.5-36.1.0-client.jar |Minecraft |minecraft |1.16.5 |DONE |NOSIGNATURE
forge-1.16.5-36.1.0-universal.jar |Forge |forge |36.1.0 |DONE |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
architectury-1.22.32-forge.jar |Architectury |architectury |1.22.32 |DONE |NOSIGNATURE
BuildingWands-2.1.4-forge.jar |Building Wands |wands |2.1.4 |DONE |NOSIGNATURE
Crash Report UUID: f68ce25f-494b-4f3d-899b-4aca173b0749
Launched Version: 1.16.5-forge-36.1.0
Backend library: LWJGL version 3.2.2 build 10
Backend API: AMD Radeon HD 7560D GL version 4.3.12793 Compatibility Profile Context 13.351.1001.0, ATI Technologies Inc.
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:
Current Language: English (US)
CPU: 4x AMD A8-5500 APU with Radeon(tm) HD Graphics

fixed on latest version