I experienced the same issue. Try looking for a server on which you can spectate. It’s indicated by a little button left to the joining button (bottom right cornor of a server-entry in the list). For me joining as spectator and player is possible on them. Preceding the loading-screen on other servers still doesn’t work for me on some servers on others it does now. Dont know whether this spectating thing is a mechanism that works or if its just random on which servers you get past the loading screen at this point.