Database server list can’t be accessed: 500 GraphQL Internal Server Error

Symptoms

• Unable to access into Tools & Settings > Database Servers > database_server_name > X (count of databases):

  500 GraphQL Error
  external server error
  Type GraphQL Error

• The following error can be found in /var/log/plesk/panel.log:

  ERR [panel] Dependent row(s) 'Domains.id = 10455' isn't found for 'data_bases.dom_id = 10455'.

Cause

Database inconsistency, the ID from the log error is missing from psa.domains table.

Resolution

Apply the solution from this article.