Panel version 7.0.23.
Website is working fine.
WP Toolkit problem websites shows the wordpress version as 0.0.0. Non-affected websites shows correct 6.8.2. All websites working fine.
WP Toolkit -> affected domain -> Modify -> Wordpress Setting -> also display error "Sorry. Specified database not found."
Affected websites had new database created. Default WP Toolkit -> Add Wordpress auto created database name is sometimes (or always) only "sql_" and not "sql_domain_com". I think the newly created database is not linked to the WP Toolkit section