Get Strange Error When Building My Game, Or Occasionally After Saving

Unity Engine
1

When I build the game I get 296 errors of:
‘Assets/Multiplayer Game Fps Build V3_Data/Managed/Assembly-CSharp-firstpass.dll’ shouldn’t be queried by IsAssemblyCompatible, missing IsInternalOrCompiledAssembly check ?
UnityEditorInternal.InternalEditorUtility:GetMonoIslands()
UnityEditor.Scripting.Serialization.Weaver:WeaveUnetFromEditor(String, String, String, String, Boolean)

Although there is no multiplayer Game Fps Build V3 in Assets Weird

Thanks For Helping Me!!!

2

Nvm I fixed it by simply restarting editor. Probably should of tried that first :0