I had a perfectly working rAthena, Client, and openserver.
I deleted my old rAthena (i dont use git, I manually cloned it), installed the latest rAthena (download, compile, and run), and deleted and reinstalled the sql tables on openserver.
All 3 servers run fine. Client starts up fine, character is created fine. But once I select the character, I get a black screen.
I hear the BGM. I hear the creaking. But then the creaking stops, on task manager it says the client is "not responding". I can't switch windows because the client is on top of everything except the task manager. The BGM continues but I can't do anything. no characters, no map, nothing. Even after I kill the client with task manager the servers don't report any errors.
So... how to fix? I'd like to emphasize client was working perfectly before updating rAthena. rAthena and the sql tables were literally the only things I changed. I even manually moved my character from the starting izlude interior to a prontera field and still black screen and not responding.