Duplicity & pca : Echec Backup (TypeError: must be str, not bytes)

Bonjour,

Je me permets ce message car je ne trouve pas l'information sur les forums ovh et launchpad.

Je n'arrive pas à faire la sauvegarde via duplicity dans mes conteneurs PCA et PCS en suivant la procédure :
https://docs.ovh.com/gb/en/storage/pca/duplicity/

Infos :
Centos 8
Duplicity 0.8.11.1596

Voici la commande que je lance :
> duplicity --verbosity debug --encrypt-key "$enc_key" --copy-links --sign-key "$sign_key" --num-retries 3 --asynchronous-upload --volsize 250 --file-prefix-manifest 'hot_' --file-prefix-signature 'hot_' --file-prefix-archive 'cold_' "$src" "multi://$HOME/script/backup/config.json?mode=mirror&onfail=abort"

Le fichier config.json est celui récupéré sur le tuto ovh (en l'adaptant bien sûr avec mes valeurs) :
> [
> {
> "description": "Cold storage",
> "url": "pca://backup-photos_cold",
> "env": [
> {
> "name": "PCA_AUTHURL",
> "value": "https://auth.cloud.ovh.net/v3"
> },
> {
> "name": "PCA_AUTHVERSION",
> "value": "3"
> },
> {
> "name": "PCA_PROJECT_DOMAIN_NAME",
> "value": "Default"
> },
> {
> "name": "PCA_TENANTID",
> "value": "mon_tenant_id"
> },
> {
> "name": "PCA_USERNAME",
> "value": "mon_utilisateur_openstack"
> },
> {
> "name": "PCA_PASSWORD",
> "value": "mon_password_openstack"
> },
> {
> "name": "PCA_REGIONNAME",
> "value": "SBG"
> }
> ],
> "prefixes": ["cold_"]
> },
> {
> "description": "Hot storage",
> "url": "swift://backup-photos_hot",
> "env": [
> {
> "name": "SWIFT_AUTHURL",
> "value": "https://auth.cloud.ovh.net/v3"
> },
> {
> "name": "SWIFT_AUTHVERSION",
> "value": "3"
> },
> {
> "name": "SWIFT_PROJECT_DOMAIN_NAME",
> "value": "Default"
> },
> {
> "name": "SWIFT_TENANTID",
> "value": "mon_tenant_id"
> },
> {
> "name": "SWIFT_USERNAME",
> "value": "mon_utilisateur_openstack"
> },
> {
> "name": "SWIFT_PASSWORD",
> "value": "mon_password_openstack"
> },
> {
> "name": "SWIFT_REGIONNAME",
> "value": "SBG"
> }
> ],
> "prefixes": ["hot_"]
> }
> ]




Voici l'erreur que j'ai :
> Writing cold_duplicity-full.20200308T151355Z.vol1.difftar.gpg
> Backtrace of previous error: Traceback (innermost last):
> File "/usr/local/lib64/python3.6/site-packages/duplicity/backend.py", line 376, in inner_retry
> return fn(self, *args)
> File "/usr/local/lib64/python3.6/site-packages/duplicity/backend.py", line 547, in put
> self.__do_put(source_path, remote_filename)
> File "/usr/local/lib64/python3.6/site-packages/duplicity/backend.py", line 533, in __do_put
> self.backend._put(source_path, remote_filename)
> File "/usr/local/lib64/python3.6/site-packages/duplicity/backends/pcabackend.py", line 153, in _put
> self.conn.put_object(self.container, self.prefix + remote_filename,
> TypeError: must be str, not bytes

> Attempt 1 failed. TypeError: must be str, not bytes

Je ne sais plus quoi faire pour débug le truc.

Merci par avance pour votre aide.

Cordialement,