title: Weird error: Microsoft (R) Visual C# Compiler version 3.5.0-dev-20359-01 (8da8ba0c)
body: <p>I have a Unity 2020.3.22f1 project that was perfectly working at first. However, this error occured after editing and saving one of my scripts in Visual Studio (with no apparent bug in it):</p>
  <p><a href="https://i.stack.imgur.com/BrYGu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BrYGu.png" alt="bug" /></a></p>
  <p>I don't give details about my script or the project, because it doesn't seem  to relate to the project itself or what I did, as the error appears now in all my Unity projects! I first tried to delete the script that triggered the bug, then I deleted the whole project. I even uninstalled/reinstalled Unity (different versions), Visual Studio and Unity Hub. But it seems that now I'm stuck with this forever.</p>
  <p>Does anyone have a single clue about this? I saw one or two people having the same problem on the web, and with no other solution than formatting the hard drive. As I'm not working on my personal computer, I can't do that...I mean, there must be a rational explanation to this bug!!</p>
  <p>I downloaded the latest version of Unity (2021.2.2f1), launched a brand new project, and the error now turned to: &quot;The specified path can't be found&quot; (rough translation from french), without more precision...still no idea what it means.</p>
  <p><a href="https://i.stack.imgur.com/6O8LA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6O8LA.png" alt="The latest error" /></a></p>