"Have a successful evening" was marked wrong. What do others think? It certainly seems to be expressing the wish for success this evening. And why is it "tonight"?
Usually "Good luck!" is used where the Dutch say "Succes!" "Have a successful evening" would technically translate to "Heb een successvolle avond" which sounds weird in Dutch and isn't said, but I think your translation would be appropriate here. Also, the hover hints for vanavond includes "this evening" as well.