I had some silent errors in Unity recently, where there was just a timestamp and no error message at all. Clicking on the errors had no effect- they wouldn't send me back to the lines in the editor that were causing the error. I then found out that all of the Using Cinemachine; etc. had errors in the editor (Visual Studio 2019). All of the packages could not be imported properly into all of the scripts they were used in. References to the packages were all broken. I traced this down to YourUnityProject\Library\ScriptAssemblies which has dlls that are generated when opening a project with Unity for the first time. There was nothing in that folder. To solve it I reset Windows 10 (keeping all my files). When I did that and reinstalled Node.js I realized that, I had downgraded Node.js to version 8 recently. I suspect that Unity Packages and Unity Hub need new Node.js versions (10 and above right now work for me). I probably didn't need to reset Windows 10 or reinstall Unity or Visual Studio multiple times. I think there should be a notification about this?