Time Machine Share not working after numerous attempts

[hartzell]

For folks who arrive at this thread and aren’t ready to update their Mac software, I left a general discussion of the issue (probably the same problem) and a workaround here:

Problem, and work around, with TimeMachine backups

Hi All, Wanted to drop a note here describing a problem I was having with TimeMachine and a new TrueNAS server, it took longer than it should have to stumble over someone’s bug report and fix. I’m sharing it here where other folks might find it more easily. I set up a fresh install of TrueNAS (25.10.4 - Goldeye) and had run a backup from my laptop without any issues. Then I moved the NAS to another location and reconfigured the pool to something fancier and, sigh, backups started failing wit…