Failed To Load Mono Fatal Error when launching a built Unity game

Hey,

Using Unity 2017.1.0f1.
When building a game, then launching it, exactly this happens:

What could be the reason for this?

Cheers!

Try reinstalling Unity. It’s possible that Mono didn’t get installed or it got corrupted somehow.

+1. I’m having the same problem. Builds works on all PCs but one in the company.