Tiquality is involved in a server crash when a player uses a fake player to perform an action, in this case it is an automated user from extra utilities. Have not tested other fake players yet though.

No plugins/sponge, mod list in crash log.
Crash log below.
crash-2019-01-25_16.16.53-server.txt

Do you still have the full log? I added specific debugging info for these scenarios.

I added extra measures: If no profile can be found, I return a dummy profile instead. (Commit 488969a)