SSH into your server
ssh root@yourservername.com
run the following commands from the terminal:
Installing Plesk Updates:
/usr/local/psa/admin/sbin/autoinstaller –select-product-id plesk –select-release-current –reinstall-patch –install-component base
Installing Plesk Micro Updates:
/usr/local/psa/admin/sbin/autoinstaller –select-product-id plesk –select-release-current –reinstall-patch –install-component base