Now I cleared manually the package cache
systemctl stop zammad
mv /opt/zammad/tmp/cache/bootsnap /opt/zammad/tmp/cache/bootsnap_old
and restarted Zammad
systemctl restart zammad
Now Zammad starts without an error, unfortunately the web interface is not working, I get a blank page.
The command zammad run rails r "Cache.clear" also do not work, I get this error:
zammad run rails r "Cache.clear"
Please specify a valid ruby command or the path of a script to run.
Run 'rails runner -h' for help.
uninitialized constant Cache
Any ideas how to fix the uninitialized constant Cache error?
