I don't seem to be able to replicate this. Is there a certain sequence of events leading to this error or does it simply occur any time you try to enter expert, even after having just started the game?
Any time i press the button CREATE in expert. I can play normal arena, start a new game or continue. it's the new update for sure. i cleared expert arena this morning.
Also. I just let my char died in the lvl 1. I took too much dmg and was looking for respawn at the early chekcpoint.
But it didn't happened. My char is gone. I checked in the settings "early checkpoints" is on.