I am working on a Fabric mod, and I just added a single item along with the lang file. It was working fine yesterday but when I tried to run it today it said this.

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 1/24/21, 1:31 PM
Description: Initializing game

java.lang.ExceptionInInitializerError
at net.minecraft.client.options.GameOptions.(GameOptions.java:146)
at net.minecraft.client.MinecraftClient.(MinecraftClient.java:440)
at net.minecraft.client.main.Main.main(Main.java:177)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
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)
at net.fabricmc.devlaunchinjector.Main.main(Main.java:86)
Caused by: java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: Failed to locate library: lwjgl.dll
at net.minecraft.client.util.InputUtil.(InputUtil.java:46)
... 11 more
Caused by: java.lang.UnsatisfiedLinkError: Failed to locate library: lwjgl.dll
at org.lwjgl.system.Library.loadSystem(Library.java:147)
at org.lwjgl.system.Library.loadSystem(Library.java:67)
at org.lwjgl.system.Library.(Library.java:50)
at org.lwjgl.system.MemoryAccessJNI.(MemoryAccessJNI.java:13)
at org.lwjgl.system.Pointer.(Pointer.java:28)
at org.lwjgl.system.Platform.mapLibraryNameBundled(Platform.java:80)
at org.lwjgl.glfw.GLFW.(GLFW.java:674)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1044)
at java.base/java.lang.invoke.DirectMethodHandle$EnsureInitialized.computeValue(DirectMethodHandle.java:357)
at java.base/java.lang.invoke.DirectMethodHandle$EnsureInitialized.computeValue(DirectMethodHandle.java:354)
at java.base/java.lang.ClassValue.getFromHashMap(ClassValue.java:226)
at java.base/java.lang.ClassValue.getFromBackup(ClassValue.java:208)
at java.base/java.lang.ClassValue.get(ClassValue.java:114)
at java.base/java.lang.invoke.DirectMethodHandle.checkInitialized(DirectMethodHandle.java:378)
at java.base/java.lang.invoke.DirectMethodHandle.ensureInitialized(DirectMethodHandle.java:368)
at java.base/java.lang.invoke.DirectMethodHandle.ensureInitialized(DirectMethodHandle.java:400)
at net.minecraft.client.util.InputUtil.(InputUtil.java:43)
... 11 more

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

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.client.options.GameOptions.(GameOptions.java:146)
at net.minecraft.client.MinecraftClient.(MinecraftClient.java:440)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.main.Main.main(Main.java:177)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
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)
at net.fabricmc.devlaunchinjector.Main.main(Main.java:86)

-- System Details --
Details:
Minecraft Version: 1.16.5
Minecraft Version ID: 1.16.5
Operating System: Windows 10 (amd64) version 10.0
Java Version: 11.0.8, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 462454512 bytes (441 MB) / 939524096 bytes (896 MB) up to 4280287232 bytes (4082 MB)
CPUs: 12
JVM Flags: 3 total; -Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=localhost:57016,server=n,suspend=y
Launched Version: Fabric
Backend library: LWJGL version 3.2.2 build 10
Backend API: ERROR NoClassDefFoundError: Could not initialize class org.lwjgl.glfw.GLFW
GL Caps:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
CPU:

Resolved: had to clean loom binaries and rerun gradlew vscode.