Same here. Similar configuration. duplicity 0.8.11
```
[...]
Restarting backup at volume 12.
Attempt 1 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 2 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 3 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 4 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Giving up after 5 attempts. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
```
Same here. Similar configuration. duplicity 0.8.11
```
[...]
Restarting backup at volume 12.
Attempt 1 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 2 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 3 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Attempt 4 failed. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
Giving up after 5 attempts. TypeError: startswith first arg must be bytes or a tuple of bytes, not str
```