Unable to create a backup of the Wordpress database in Plesk: Table 'wordpress_db.qwerty_wfVulnScanners' doesn't exist in engine

Symptoms

Unable to create a backup of the Wordpress database in Plesk, the following warning appears in Plesk:

PLESK_WARN: Warning: mysql "wordpress_db" @ESCAPE_VALUE_BEGIN@Unable to execute SQL: Table 'wordpress_db.qwerty_wfVulnScanners' doesn't exist in engine. SQL query: SHOW FULL COLUMNS IN qwerty_wfVulnScanners@ESCAPE_VALUE_END@

Cause

Inconsistency in tables of Wordfence Security plugin.

Resolution

Contact Wordfence Security plugin developers.

As a workaround, go to Domains > example.com > Wordpress > select instance > Plugins and remove the Wordfence Security plugin:

If the issue persists, delete the remained tables:

1. Log in to Plesk
2. Go to Domains > example.com > Databases and click phpMyAdmin:
   
   
3. In phpMyAdmin select the table from the warning message > click Drop > OK: