Increase the size of /tmp.
How this is done depends on your configuration. I think openSUSE uses a RAM-based filesystem for /tmp.
To access your PC, open a text terminal, probably by pressing ctl-alt-F1 or ctl-F1 or a similar key combination. Log on, then check disk space, /etc/fstab and the systemd mount units:
Code:
df -h
grep tmp /etc/fstab
systemctl list-units --type mount
With a little luck, that should provide enough information about the problem.
If you can't logon, you need to boot into
single user mode first.
