I cannot upgrade/update Plesk with error:
Error message or request description : Error: Unable to start Parallels Products Installer. The following error has occurred: Execution failed. Command: autoinstaller Arguments: Array (  => --service-mode  => --enable-xml-output  => --ssl-cert  => /usr/local/psa/admin/conf/httpsd.pem  => --branch  => current,release,stable ) Details: file does not exist or is not executable: /usr/local/psa/admin/bin/autoinstaller
Plesk autoinstaller is corrupted due to previous failed upgrade attempts.
http://autoinstall.plesk.com/in web browser and navigate down the directory structure according to your Plesk version and your operating system version.
psa-autoinstallerpackage and copy its URI
psa-autoinstallerpackage from Plesk repository using the URI:
Install the downloaded package:
rpm -Uvh psa-autoinstaller-<version>.rpm
Re-run Plesk update