Server Crashes on start (MC 1.20.1)

[Dark-Matter1]

When I try and start my server, using the fabric-server-mc.1.20.1-loader.0.16.9-launcher.1.0.1, the server outputs this error and crashes:
[Server thread/ERROR]: Encountered an unexpected exception java.lang.NoSuchMethodError: 'void sun.misc.Unsafe.ensureClassInitialized(java.lang.Class)' at io.izzel.arclight.api.Unsafe.ensureClassInitialized(Unsafe.java:85) ~[Cardboard-1.20.jar:?] at io.izzel.arclight.api.Unsafe.<clinit>(Unsafe.java:22) ~[Cardboard-1.20.jar:?] at org.bukkit.craftbukkit.util.CraftMagicNumbers.<clinit>(CraftMagicNumbers.java:156) ~[Cardboard-1.20.jar:?] at net.minecraft.class_3176.handler$zzb000$cardboard$init(class_3176.java:695) ~[server-intermediary.jar:?] at net.minecraft.class_3176.method_3823(class_3176.java:147) ~[server-intermediary.jar:?] at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:646) ~[server-intermediary.jar:?] at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) ~[server-intermediary.jar:?] at java.lang.Thread.run(Thread.java:1575) ~[?:?]

then stops the server and outputs this last:
Exception stopping the server java.lang.NullPointerException: Cannot invoke "net.minecraft.class_3218.method_8621()" because "$$5" is null at net.minecraft.server.MinecraftServer.method_3723(MinecraftServer.java:541) ~[server-intermediary.jar:?] at net.minecraft.server.MinecraftServer.method_3782(MinecraftServer.java:602) ~[server-intermediary.jar:?] at net.minecraft.class_3176.method_3782(class_3176.java:537) ~[server-intermediary.jar:?] at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:703) ~[server-intermediary.jar:?] at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) ~[server-intermediary.jar:?] at java.lang.Thread.run(Thread.java:1575) ~[?:?]

For mods, I have Cardboard-1.20.jar, iCommon-Fabric-bundle.jar, and fabric-api-0.92.2+1.20.1.jar.
Happens with and without plugins installed.

I am not sure what is causing the issue so not sure how to reproduce.