@cirialkilr did you manage to resolve this ...?
i get the same error however when the cgheck the logs on the SQL server i see the below error
Aborted connection 50 to db: 'onlyoffice_mailserver' user: 'mail_admin' host: 'onlyoffice-mail-server.onlyoffice' (Got an error reading communication packets
@Jidovu Marius Adrian can you please help.