Plesk is not accessible: 500 Internal Server Error. Cannot parse repository file

Symptoms

• Plesk is not accessible with the one of following error is shown in a browser:

  PLESK_INFO: HTTP Error 500.0 - Internal Server Error
  C:\Program Files (x86)\Parallels\Plesk\admin\engine\php-cgi.exe - The FastCGI process exited unexpectedly

  ---

  PLESK_ERROR: Your License key has expired. In order to use Plesk, obtain and install a new valid license key.

• Tools & Settings > License Management > Retrieve Keys fails with the error:

  PLESK_ERROR: Error: Updated licese key is not valid
  Key Update Status
  Incorrect ServerInfo format

• Execution of the command plesk login results in one of the following error messages:

  C:\> plesk login
  Terminating: exception was raised, but it cannot be converted to Zend exception yet: error: Empty repository file: C:\Program Files (x86)\Parallels\Plesk\admin\repository\registry.xml
  exit status 1

  ---

  C:\> Terminating: exception was raised, but it cannot be converted to Zend exception
  yet: error: Cannot parse repository file: "D:\Program Files (x86)\Parallels\Ples
  k\admin\repository\registry.xml".
  XMLRPC error: Not valid XML. Invalid XML "content".
  ': Invalid token, starting 0 bytes in

  ---

  C:\> exit status -1073741819

Cause

The file %plesk_dir%admin\repository\registry.xml is empty or corrupted.

Resolution

1. Connect to the Plesk server via RDP.

2. Rename or delete the file registry.xml located in %plesk_dir%admin\repository.

3. Restart Plesk Management Service in Plesk Services Monitor.

   

4. Log in to Plesk and click Retrieve Keys at Tools & Settings > License Management.