IntelliJ, Alt+Enter doesnt work

Question

When working with IntelliJ on a JavaProject it shows to use alt + enter to import a class for example, but this isnt working anymore.

It worked in the past, but some

Answer 1

"Well, it means IDE doesn't see the shortcut for some reason. Probably it's already used by some other application or the operating system. – CrazyCoder 25 mins ago "

i closed all applications and it turns out that, Facebook GameRoom, running in the background, somehow is the reason the shortcut doesn't work, i have no idea why, but thats the solution

many thanks to CrazyCoder