Is unity broken?

OK I seem to have run into a major problem (I think). I cant start the playable game because the compilers aren’t not fixed… So I went to go and check the errors out and

The first error says “ApplicationException: Unable to find a suitable compiler
UnityEditor.Scripting.ScriptCompilers.CreateCompilerInstance (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform)”

The Second one says “Failed to create compiler instance”

The third says “ApplicationException: Unable to find a suitable compiler
UnityEditor.Scripting.ScriptCompilers.CreateCompilerInstance (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform)”

The forth is the same as the the second one.

and last it says "KeyNotFoundException: the given key was not present in the dictionary?

I honestly don’t know what these mean can anyone help I am super stuck… THANKS SO MUCH IN ADVANCED!!! <3

Absolutely reinstall Unity

If you have saved your assets and your projects outside of the Unity install directory, your assets and projects should be saved.

If not, move them out of the installation directory to a different unrelated location and if you want to be sure, copy them to a external hard drive as well.

All your assets and projects will be safe, while you reinstall Unity

Any personal settings you have applied will however be lost, like the layout of Unity and recent projects etc.