Water problem,Could not fetch error message.

Okay so I had some trouble with water,I didn't have the animation file so I deleted it and re-imported it,but now I am getting an error message when I try testing the game,it doesn't look like the message is there,and this is the error message.

Could not fetch error messages from compilerInvalidOperationException: The process must exit before getting the requested information.System.Diagnostics.get_ExitCode ()

Not sure what it means,any ideas on how to fix this? It wont let me start testing till I fix it.