Comment 11 for bug 1855195

Sorry for the double post. There seems no way to edit posts though. So here is the full error message I get:

Traceback (innermost last):
  File "/snap/deja-dup/252/bin/duplicity", line 101, in <module>
    with_tempdir(main)
  File "/snap/deja-dup/252/bin/duplicity", line 87, in with_tempdir
    fn()
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/dup_main.py", line 1539, in main
    do_backup(action)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/dup_main.py", line 1663, in do_backup
    full_backup(col_stats)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/dup_main.py", line 569, in full_backup
    globals.backend)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/dup_main.py", line 426, in write_multivol
    globals.volsize)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/gpg.py", line 393, in GPGWriteFile
    data = block_iter.__next__().data
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/diffdir.py", line 541, in __next__
    result = self.process_continued() # pylint: disable=assignment-from-no-return
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/diffdir.py", line 725, in process_continued
    data, last_block = self.get_data_block(self.process_fp)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/diffdir.py", line 709, in get_data_block
    buf = fp.read(read_size)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/diffdir.py", line 452, in read
    self.sig_gen.update(buf)
  File "/snap/deja-dup/252/lib/python3.6/site-packages/duplicity/librsync.py", line 224, in update
    self.buffer += buf
 TypeError: can't concat str to bytes