Diagnose & Repair tool provides the error when repairing Plesk installation: 500: Plesk\Expection\Database

Symptoms

• When clicking on the Repair button near the Plesk Installation aspect in Tools & Settings > Diagnose & Repair the following error is displayed:

  PLESK_ERROR: 500: Plesk\Expection\Database

  ---

  PLESK_ERROR: 500: Internal Server Error

  ---

  PLESK_ERROR: 400: Bad Request

  And near the Plesk Installation aspect the message below appears:

  CONFIG_TEXT: Could not check the aspect. Please try again later.

• If refreshing the page in a browser, the repair operation is reported to be running and no errors are displayed.

Cause

During the execution of the plesk repair command with the installation aspect, the tool is checking and fixing multiple issues including the MySQL server. Plesk becomes inaccessible at that moment, so the error appears. 

Such Repair Kit behavior was confirmed as a Plesk extension bug with ID EXTPLESK-3451. The error message can be safely ignored.

Resolution

Until the bug is fixed as a workaround refresh the Tools & Settings > Diagnose & Repair page in a browser and wait for the process to complete.