Next — Social Music Discovery

I had the app since a few months ago, but I never posted anything. Eventually, I decided to delete my account and create a new one just for posting videos. But ever since I made the new account, everytime I enter the app, it makes me log in again with the message "Failure to authenticate. Try again!" And, every time I leave the app (not exiting out of it completely, just leaving the tab temporarily) it makes me log back in as well. Otherwise, it's a pretty fun app to have.

facebook says invalid application

I really can't understand what the developers are doing. Time and time I've tried again, and I still can't even make an account... This app seems like it would be a fun musically social app, but alas, it's potential is going down the drain.