After upgrading to MacOS High Sierra: The selected network backup disk does not support the required capabilities
After upgrading to MacOS 10.13, from 10.12 clients and 10.12 Server, Time Machine stopped working on ALL upgraded clients with this error: The selected network backup disk does not support the required capabilities
Nothing else changed, backup disk is still the same but as some of you know, Apple removed Time Machine from MacOS Server 5.4 and integrated it into MacOS 10.13 software. It is so unapple to brake so much connectivity with those major upgrades. FTP is gone, client side and server side too, telnet terminal gone, and AFP is being ditched a little at a time.
Thing is I can't narrow it down to what gives this error. Looked into Console, and backupd doesn't give many clues about what is going on.
Drive is a hardware RAID array, connected to the Server via Thunderbolt and formatted HFS+. The backup folder is shared both AFP and SMB.
MacBook Pro (15-inch, 2017), macOS Sierra (10.12.6)