My 7th level fighter (Thexder) is unable to walk into the training area from the outdoors map (no matter from which direction I approach it). Just to clarify, I'm talking about the compound to the south of the Baladus Stockade.

When I try to move into this area, I get no reply from the game. Following another person also doesn't work, I just get left behind.

It's possible that there is more than one bug causing this.

All fixed!

It turned out the mud didn't print out the error message (level restrict). As you discovered, fighters level up to 8th in the university.