When launching a particular game - Rocket League in this case - I get "Game Launch Failed, error code 51". How can I fix this?
This is what it looks like:
I've seen a lot of 'solutions' around the net (often involving other games), but I can't find one that works in my case. I've tried reinstalling both Rocket League and Steam, but I keep getting the same problem. Other games seem to start just fine.