Help Needed Resolving An Error Message

Hello,

This is my first time making a mod and I'm running into some issues. I'm making this mod for 1.16.4 fabric and I have the fabric API installed. I'm using IntelliJ to code this mod and when I run the mod in IntelliJ everything works just fine until I try to compile it and run it in the normal Minecraft launcher. I get this error message: "The game crashed whilst initializing game Error: java.lang.RuntimeException: Cannot instantiate mods when not frozen! Exit Code: -1"

Here is the full crash report:

Description: Initializing game

java.lang.RuntimeException: Cannot instantiate mods when not frozen!
    at net.fabricmc.loader.FabricLoader.prepareModInit(FabricLoader.java:451)
    at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointClient.start(EntrypointClient.java:31)
    at net.minecraft.class_310.<init>(class_310.java:437)
    at net.minecraft.client.main.Main.main(Main.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:226)
    at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:139)
    at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)

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

-- Head --
Thread: Render thread
Stacktrace:
    at net.fabricmc.loader.FabricLoader.prepareModInit(FabricLoader.java:451)
    at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointClient.start(EntrypointClient.java:31)
    at net.minecraft.class_310.<init>(class_310.java:437)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.main.Main.main(Main.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:226)
    at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:139)
    at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)

-- System Details --
Details:
    Minecraft Version: 1.16.4
    Minecraft Version ID: 1.16.4
    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: 797611152 bytes (760 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 8
    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: 
    Launched Version: fabric-loader-0.11.1-1.16.4
    Backend library: LWJGL version 3.2.2 0.8.2+build.24+unknown-b24.git-unknown
    Backend API: NO CONTEXT
    GL Caps: 
    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fabric'
    Type: Client (map_client.txt)
    CPU: <unknown>

If anyone knows how to help me with this, it would be greatly appreciated.