Symptoms
-
Plesk Update fails with the error message:
Upgrading Plesk repair module...
Failed to install 'C:ProgramDataPleskInstallercachepoolreleasePLESK-WIN_18.0.20_1215dist-windowsplesk-repair-module.msi': Fatal error during installation. (Error code 1603)
ERROR: The installation of the package 'plesk-repair-module' failed with code 1603. (upgrade: Upgrading Plesk repair module...) -
At the same time, the following messages appears in Event Viewer > Windows Logs > Application:
Application 'C:WindowsSysWOW64inetsrvw3wp.exe' (pid 42148) cannot be restarted - Application SID does not match Conductor SID.
Cause
Unclear.
Resolution
-
Connect to the Plesk server via RDP.
-
Stop the IIS service:
Warning: Plesk and websites will be offline while IIS is stopped.
C:> iisreset /stop
-
Open the folder
C:ProgramDataPleskInstallercachepoolrelease
and search forplesk-repair-module.msi
. -
Choose the
plesk-repair-module.msi
file from the oldest Plesk version folder and run it to uninstall the package. -
Start the IIS service:
C:> iisreset /start
-
Update Plesk with the command:
C:> plesk installer update