Backup fail with duplicity FilePrefixError

Hi everybody,
Backupdata fails but I don’t undestand where is the problem. This is the log.
Someone can help ?
Thanks

Traceback (innermost last):
File “/usr/bin/duplicity”, line 1581, in
with_tempdir(main)
File “/usr/bin/duplicity”, line 1567, in with_tempdir
fn()
File “/usr/bin/duplicity”, line 1406, in main
action = commandline.ProcessCommandLine(sys.argv[1:])
File “/usr/lib64/python2.7/site-packages/duplicity/commandline.py”, line 1154, in ProcessCommandLine
set_selection()
File “/usr/lib64/python2.7/site-packages/duplicity/commandline.py”, line 978, in set_selection
sel.ParseArgs(select_opts, select_files)
File “/usr/lib64/python2.7/site-packages/duplicity/selection.py”, line 272, in ParseArgs
for sf in self.filelist_globbing_get_sfs(filelists[filelists_index], 1, arg):
File “/usr/lib64/python2.7/site-packages/duplicity/selection.py”, line 371, in filelist_globbing_get_sfs
yield self.glob_get_sf(line, include)
File “/usr/lib64/python2.7/site-packages/duplicity/selection.py”, line 434, in glob_get_sf
sel_func = self.glob_get_filename_sf(glob_str, include)
File “/usr/lib64/python2.7/site-packages/duplicity/selection.py”, line 502, in glob_get_filename_sf
raise FilePrefixError(filename)
FilePrefixError: cd /var/lib/nethserver/ibay/backup

Duplicity backup failed
Action 'backup-data-duplicity gio

Does /var/lib/nethserver/ibay/backup exist?

Are there wrong custom included/excluded paths in the data backup configuration?

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