If you're a returning player, have you re-downloaded since returning?
Did you download into a completely 100% new folder, not into the old folder?
If you did both of those things, the most obvious question is: Do you have the gepard.dll file in your jellyro folder?
You might have to re-download if you are missing that file, again into a 100% new folder, not into the old one.
If you're not a returning player and have things working fine up until today, did your antivirus quarantine the file for whatever reason?
Sorry for playing 20 questions but trying to cover as many bases as I can so there's little back and forth so you can get in game sooner.
