Gdm3 keeps returning to logging

I have a problem with my gnome login : each time I try to login it just return to the login. I also tried with lightdm but it is doing the same sh**

I don’t know where the problem may be coming from but I have this error when I try to reconfigure it: https://i.stack.imgur.com/Bnmcy.jpg

This is the output from service gdm3 status after 2 login try: https://i.stack.imgur.com/25nGP.jpg

I think the error is from here but I don’t know what to do to resolve it…

I’m not running on Ubuntu but on Netrunner (a Debian based distro) I hope you can help me anyway. And I apologize for my bad English.