pcabackend.py Type Error

[GorgeousChirp]

Hi

I get the following error when using pcabackend:

Écriture de cold_duplicity-full.20200404T152234Z.vol1.difftar.gpg
MultiBackend: _put: write to store #0 (pca://duplicity_cold)
Écriture de cold_duplicity-full.20200404T152234Z.vol1.difftar.gpg
Trace inverse de l'erreur précédente : Traceback (innermost last):
  File "/usr/lib/python3.8/site-packages/duplicity/backend.py", line 376, in inner_retry
    return fn(self, *args)
  File "/usr/lib/python3.8/site-packages/duplicity/backend.py", line 547, in put
    self.__do_put(source_path, remote_filename)
  File "/usr/lib/python3.8/site-packages/duplicity/backend.py", line 533, in __do_put
    self.backend._put(source_path, remote_filename)
  File "/usr/lib/python3.8/site-packages/duplicity/backends/pcabackend.py", line 153, in _put
    self.conn.put_object(self.container, self.prefix + remote_filename,
 TypeError: can only concatenate str (not "bytes") to str

Duplicity tries 5 times then cancels.

duplicity 0.8.11
Python 3.8.2
Arch Linux, packages from regular repos.

Have a great day