"Nothing is wrong."
Translation:Nichts ist falsch.
It means nothing is incorrect. As far as feelings go, there's not a good literal translation of the English phrase on that one. You would rather ask "Was ist los?" (what's going on?) or something like that. But generally speaking Germans spend a lot less time asking people if there is something wrong with them, so it just doesn't come up that much.
Here are a couple of examples of it's use on Reverso Context