TypeLoadException: Could not load list of method overrides

Hi all,
I asked this in Unity Answers allready but no response and it is burried already.

I’m getting this error when I run my project. Everything works as intended. This error even comes up when I have a empty scene.

I could not find any solution on google.

I’m using Unity 2017.4.2f2 with C#4.6. Visual Studio

FIXED: I just found the problem. I was using SQLite in my project at first but then decided to go with php/mysql and I forgot to delete the dll for SQLite and these where giving me this error.