Player gets stuck in some places on the map

Hello all my player gets stuck in some places on the map. I’ve already tried to set the nav mesh, but it doesn’t work either and the player can walk through walls. I’m using version 4.26. Please give me feedback in German too.

Is this your player, or an NPC?

Have you looked at the map in player collision mode?

333606-screenshot-2.jpg

It is a Player. Thank you