by Mike Henry.
That's correct, we do have a load balancer. Another thing that we're discussing with Moodle US Support is whether we should have only one cron server that isn't user-facing, vs. our current setup of 4 web servers where 3 of them run cron every minute. All the servers do share $CFG->filedir but not $CFG->dataroot (MoodleData), and I did notice MoodleData/temp in the path in the error message. Is there a setting or user process for the restore path to use filedir and not dataroot? E.g. something like have the user upload the MBZ to private files first and then restore from there?