Das Problem sieht meinem recht ähnlich, welches ich im Thema Probleme mit V76 habe.
folgendes sehe ich in meinem Log (Windows PC) beim Versuch, mich über die externe Schnittstelle anzumelden (interne funktioniert):
[2021-09-10 11:40:54.284] [T11632] [Debug] [account] New store state: data::Account::StoreCreating
[2021-09-10 11:40:54.284] [T11632] [Debug] [service.StoreService] Check versions, clientVersion: 77.0.1953 , dbVersion: 77.0.1953
[2021-09-10 11:40:54.284] [T11632] [Debug] [account] New store state: data::Account::StoreMigrating
[2021-09-10 11:40:54.284] [T11632] [Debug] [service.StoreService] MigrationManager finished migration database with result: pc::migration::MigrationManager::AlreadyMigrated resync: false
[2021-09-10 11:40:56.825] [T11632] [Warning] [service.IqDispatcher] "Failed to send command: iqId: cmd: location::Find"
[2021-09-10 11:40:58.428] [T11632] [Warning] [proto.xmpp] "SSL errors"
[2021-09-10 11:40:58.428] [T11632] [Warning] [proto.xmpp] "The host name did not match any of the valid hosts for this certificate"
[2021-09-10 11:40:58.550] [T11632] [Warning] [service.MdSoftphone] Network Environment. TLS: true IPv6: false SRTP: true NAT64: false
[2021-09-10 11:41:08.156] [T11632] [Warning] [service.store] SQL Query failed. Code: "" Message: "Parameter count mismatch"
[2021-09-10 11:41:08.156] [T11632] [Warning] [service.store] SQL Query failed. Code: "" Message: "Parameter count mismatch"
[2021-09-10 11:41:08.156] [T11632] [Critical] [service.SettingsStore] Can't query value for key "client~version" , error: "Parameter count mismatch"
[2021-09-10 11:41:25.362] [T11632] [Warning] [service.ConnectionTransportDiscovery] Authentication failed, wrong credentials provided