Crash to log in after server select?

[Darkslide632]

So I used to play P99 years and years ago, and recently decided to try again with news of a potential new server. Fortunately I remembered all my account information... but once I select a server, it pauses for a second and then kicks me back to the login. No error messages, no nothing.

I'm on Windows 10. I tried manual install, I tried a duxa install, I've added exceptions to my anti-virus, tried running with WinEQ 2.0, EQEmu, and just with the standard bat file. I have set exe files to various compatibility settings, I've changed to windowed mode...

Any thoughts?

Thanks.