https://www.plesk.com/kb/support/plesk-login-page-displays-error-db-query-failed-unknown-error/
Plesk login page displays error: DB query failed: Unknown error - Support Cases from Plesk...
Symptoms Plesk login page shows one of the following error: ERROR: PleskMainDBExceptionDB query failed: Unknown error ERROR: Exception: Unable to get...
plesk login
https://www.plesk.com/extensions/oauth/
OAuth Login extension - Plesk
May 15, 2026 - OAuth Login extension. Explore the ecosystem of Plesk
oauthextensionplesk
https://www.plesk.com/kb/support/cannot-login-to-plesk-your-license-key-has-expired/
Cannot login to Plesk: your license key has expired - Support Cases from Plesk Knowledge Base
Symptoms When the product license is about to expire, the following error is shown upon login to Plesk: You are currently operating within the grace period of...