I have this error during remote sync

2021-05-02T20:12:15+02:00: no data changes
2021-05-02T20:12:15+02:00: re-sync snapshot "ct/114/2021-05-01T19:53:53Z" done
2021-05-02T20:12:15+02:00: percentage done: 17.65% (2 of 17 groups, 100 of 100 group snapshots)
2021-05-02T20:12:15+02:00: sync group host/fileserver failed - group lock failed: Permission denied (os error 13)
2021-05-02T20:12:15+02:00: sync group vm/101 failed - group lock failed: Permission denied (os error 13)
2021-05-02T20:12:15+02:00: sync group vm/102 failed - group...

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