You missed a few important steps…
- Logout
- Use Ctrl+Alt+F3 (or substitute F3 for F4/F5/F6/F7) to login to a TTY shell
- Delete (or rename) the
~/.cache
directory:
rm -rf ~/.cache
(to delete it)
mv ~/.cache ~/.cache_old
(to rename it)
This must not be done while logged in to the Plasma shell. - Logout from the TTY using:
exit
- Switch back to SDDM (login screen) Ctrl+Alt+F2
- Reboot.
The cache will be regenerated (like a timelord) at next login. - Login to Manjaro.
I hope this helps. Cheers.