Unity throws empty errors, won't launch the game. What's the matter?

Question

Unity

There are empty errors in the project, due to which it is impossible to start the game, it is impossible to make a build. The errors have the same number.

Reinstalling does not help, installing an older version does not help either. What to do about it, how to fix it?

Answer 1

in short, look, if you have scripts in Java, then in unity 2018.3 they decided to completely abandon scripts in javascript.
Now the only supported scripting language is C#. That is, all old javascript scripts are now missing from the assembly, and C# scripts with links to them are not loaded. And now it will be so in all new versions of 2018.3+.
To solve this problem, you need to remove the javascript scripts or install Unity 2018.2.7f1