Solved the problem, service
sw_cp_server
failed to start, so I followed the instructions here:
https://support.plesk.com/hc/en-us/articles/213374869-Plesk-is-not-accessible-after-upgrade-ssl-ciphers-directive-is-duplicate
Thanks for your help.
I attached what error I get in the browser. I can still access the port 8447 for Install and updates.
# plesk repair installation
is this a terminal command? I can run it via SSH ?