'RoslynScripts\unity_csc.bat' not found, even after complete reinstallation

Hello,
I'm currently having some trouble with the unity engine.
Earlier today, I wanted to build my current project. It game me an error stating:

'[...]\RoslynScripts\unity_csc.bat' not found. Is your Unity installation corrupted?

I reinstalled the unity version I'm working on, with no change. So I reinstalled entirely the unity version and the unity hub, and it fixed it.
So I continue working happily on my project, until my scripts stop compiling 3 hours later and I can't add them to objects anymore. I look at the console, and sure enough, I get the same error.
I restart unity, no change. So I look at that RoslynScripts folder, and it was, in fact, completely empty.
I'm not aware of what it's supposed to contain, but I suppose that it was there at some point as it could compile for a few hours.
How did it get deleted then? My antivirus? I use Avast, and I didn't get any pop ups saying it removed a file.

Please help, I don't want to reinstall everything every 2 hours to be able to make my game.

 

Well it appears that my antivirus put the file in the "quarantine zone". I took it out, it should now be fixed.