Plesk for Windows Server shows 503 Service Unavailable:

[mahesh]

Question:
Plesk for Windows Server shows 503 Service Unavailable: Cannot read configuration file
Symptoms

• When accessing Plesk, the following error appears in a browser:

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Service Unavailable.
HTTP Error 503. The service is unavailable.

• The "PleskControlPanel" application pool at IIS Manager > SERVERNAME > Application Pools is stopped. After starting it manually, the application pool stops on the next attempt to open Plesk in a browser.
• The following error message appears in the Event Viewer Application log (Windows Logs):

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The worker process for application pool 'PleskControlPanel' encountered an error
'Cannot read configuration file due to insufficient permissions
' trying to read configuration data from file '?\C:\inetpub\temp\apppools\PleskControlPanel\PleskControlPanel.config', line number '0'.
The data field contains the error code.


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The worker process for application pool 'PleskControlPanel' encountered an error
'Cannot read configuration file
' trying to read configuration data from file '\\?\<EMPTY>', line number '0'.
The data field contains the error code.
Cause
Plesk configuration file PleskControlPanel.config located at C:\inetpub\temp\appPools\PleskControlPanel is corrupted.

Resolution

• Connect to the Plesk server via RDP.
• Rename the PleskControlPanel.config file located at C:\inetpub\temp\appPools\PleskControlPanel. This file will be automatically generated on the next attempt to open Plesk.
• Start Plesk Reconfigurator at Windows Start > All Programs > Plesk.
• In Plesk Reconfigurator, click Repair Plesk Installation > select Check Plesk Services > click Check.

5.Restart IIS using the following command in a command prompt:

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c:\>iisreset /restart
6.Open Plesk in a web-bowser.