No, that command did not change Discover. Still no search results at all.
~$ sudo appstreamcli refresh
[sudo] password for ###:
AppStream cache update is not necessary.
~$ sudo appstreamcli refresh --force
AppStream cache update completed, but some metadata was ignored due to errors.
~$
No, that command did not change Discover. Still no search results at all.
~$ sudo appstreamcli refresh
[sudo] password for ###:
AppStream cache update is not necessary.
~$ sudo appstreamcli refresh --force
AppStream cache update completed, but some metadata was ignored due to errors.
~$