Plesk login page displays error: DB query failed: Unknown error

Symptoms

Plesk login page shows one of the following error:

• PLESK_INFO: ERROR: PleskMainDBException
  DB query failed: Unknown error

• PLESK_INFO: ERROR: Exception: Unable to get administrator password: Can’t decrypt data

• PLESK_INFO: ERROR: Exception: Unable to get administrator password: The system cannot find the file specified. (Error code 2)

• ERROR: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [1045] Access denied for user 'admin'@'localhost' (using password: YES)

Cause

Plesk administrator password in the Windows registry and/or Plesk SQL Server administrator password in the mysql database are corrupted/incorrect.

Resolution

• Plesk 17.8 and Plesk Obsidian

  Automatic Solution (Recommended)

  1. <a href="https://support.plesk.com/hc/article_attachments/360006482414/plesk178-admin-pass-reset…