I tried deleting the debug file, but it still doesn't work. Is there any other way?

I managed to fix it. Open the mini client, but don't close it. Then open the 2nd one and wait for it to load. But somehow I got some new problems: I always log in my old server when I use the client, not the current server, and it can't load the "Combat" part in space time, and it can't open many accounts at the same time. Do these things happen to you guys?