Everytime I try a plugin on server I get this message

[Error] Error while compiling LogsGenerator: Compiler disconnected message was null
Compiler failed: Compiler disconnected message was null
Compiler 1.0.526.0 was closed unexpectedly
Compiler failed: Compiler 1.0.526.0 was closed unexpectedly
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)​

Please make sure you are using the latest uMod agent version via normal method or the command below via PowerShell.

dotnet tool update uMod --version "*-*" --global​

After that, update with the uMod agent.

umod update valheim -P --force​

If that does not work, remove the umod/apps directory and try the process of updating again.