After updating all patches(*.*), lost GUI access as user(admin), but not ssh.
Here is what you could try to resolve the issue.
chris@ubuntu_server:~$ ls -l /home/chris/.Xauthority
-rw——- 1 root root 51 Sep 14 11:02 /home/chris/.Xauthority
Somehow, ownership has been changed. Don’t know why……. Let’s change it.
chris@ubuntu_server:~$ sudo chown chris:chris /home/chris/.Xauthority
chris@ubuntu_server:~$ ls -l /home/chris/.Xauthority
-rw——- 1 chris chris 51 Dec 15 16:07 /home/chris/.Xauthority
Now, I am able to access Ubuntu Server thru GUI.
By the way, if you have an issue with SSH, check the below link
How To Install and Enable SSH Server on Ubuntu 20.04 – devconnected