I created a new user in Yast2 without checking the "Defaults for New Users" as
i've created users in the past with no issues. I've not created a user for a
few years so i have no idea when this became a problem.

Background:
I tried to log in with this new user but got an Xsession error (looked like  a
format from the 1980s) saying its disabled but i can login via terminal
session. The only way to clear that Xsession error is to Ctrl Backspace
Backspace, it does have an "okay" button on the message but its unclickable and
un-escapeable or any key.

Solution
I then went back and checked the list of users in Yast2 and my new one did not
belong to any groups. I checked "Defaults for New Users" and saw "users" was
the default group but the "Default Login Shell" and "Skeleton for Home
Directory" were blank.  I put in /usr/bin/bash and  /etc/skel, deleted the old
user and created a new one which allowed me to login fine.