Plesk UI shows the following error:
ERROR: PleskExceptionDatabase: DB query failed: SQLSTATE[HY000]: General error: 1 Can't create/write to file 'C:Program Files (x86)ParallelsPleskMySQLData#sql12bc_252_0.MYI' (Errcode: 28), query was: DESCRIBE
Additionally, an exception has occurred while trying to report this error: Zend_Exception
No entry is registered for key 'translate' (Mysql.php:53)
No free disk space left on C:
Due to the lack of disk space, MySQL is not able to create temporary files, and, as a result, unable to execute a query.
Free the disk space or contact service provider to allocate more.
Note: In the case displayed on the screenshot the disk space is lower than the minimum recommended. For minimal hardware requirements refer to Official Documentation.