thanks for your fast reply.
I've tryed various. the message of server is:
root@server6:~# /usr/local/psa/bootstrapper/pp11.0.9-bootstrapper/bootstrapper.sh repair
===> Preparing upgrade
-- Warning: Skipping the data of table mysql.event. Specify the --events option explicitly.
Stopping...
During the upgrade to version 11.5, the installation fail and does not go forward.
The websites and email work, but plesk on port 8443 is not accessible. the installation log says:
INFO: ==> STEP 28: Checking the availability of Plesk Panel TCP ports...
INFO: Unable to connect to IP address...