Compilation failed because the compiler couldn't be executed

How do I check the game script cause my game says Compilation failed because the compiler couldn’t be executed! Any help please I really need to sovle it cause I want to test my game.

I reply even if this thread is old, my case can maybe help others.

I had the same problem because ThreatFire, my antivirus, had quarantined “Mono.exe”
Yes, ridiculous !