I just tried and can join just fine, no problem here.
Where does it stop for you? You see the server in the list, can select it and press the join button? Or are you missing components? Maybe try a reboot first, that does wonder sometimes.
Just bought Borderlands3 and Steep so this would be too much otherwise was coming in. It is a nice grid I see there and quite full, it would've been great to be part of it but , yeah maybe another time.