Guys Im sort of at my wits end here...

So I was simply spawning a couple npcs to my home and objects, nbd right? Well then I could no longer log in to my account. And I had no idea what was going on so I just removed my changes, even tho they were spawned correctly, and couldnt have anything to do with the problem. So I could log in a new account, but could not log back in once it was logged out. It writes new character files but wont log back in. If i restart the server you can log back in but same thing.... Will someone please help? I am running my server through eclipse IDE. I made a backup earlier today when the server was working fine, and I even tried running that, and it has the same problem! So I am not thinking it is a problem with the files? I am very confused and could definitely use some troubleshooting help

I tried running the original package, and it is fine, but my backup from earlier does not allow us to log back in.... I haven't had ANY issue with this since I started? And dont understand why my backup wont work..

I JUST started getting loyal players, and this is not good....