Unable to connect to server

[MAL22]

I tried running a server with the new build 26 but alas, it prints out this error everytime someone tries to log in. I tried using my external and internal IP without success. Tried hosting it on two different machines.
 

- I5-3570K | 8GB RAM | HD7950 and Athlon 2650e | 1.5GB RAM | Mobility X1200

- Windows 8.1 X64 and Windows Home Server 2008 R2

- ~30mbps for both upload and download

- Used steam to verify the integrity, deleted my server files and started a new one from scratch

- Here is the code printed when I try to log :

ID_NEW_INCOMING_CONNECTIONid=0 guid=81065501593803479User Xorg is trying to connect.java.lang.NullPointerException	at zombie.network.ServerWorldDatabase.authClient(ServerWorldDatabase.java:239)	at zombie.network.GameServer.mainLoopDealWithNetData(GameServer.java:1056)	at zombie.network.GameServer.main(GameServer.java:271)ID_DISCONNECTION_NOTIFICATION

-The server runs on a physical machine.

[EasyPickins]

It looks like it failed to open the user database file, probably there was an error printed earlier in the console.

This can happen if your username has non-Latin characters in it.

We had issues with Russian and Chinese usernames not working.

 

See this post for a possible fix.