I found the solution to the problem in the following post:
It is necessary to configure a local repository for rclone (as described in the linked post, but please note: the repository type number in my version of rclone is 33 instead of 30), although this does not seem to be necessary when using rclone on its own.
I think it would be good to include a note in the documentation at
You can certainly open a GitHub issue about it, but be clear on the request.
Chances of tracking the rclone number is low because they always change.
If you want the manual to talk about the local repository, it already mentions:
I think the best solution would be to change Duplicati so that it does not require a local repository (as you also mentioned in your posting).
However, if this behavior is not changed, I would suggest adding the following note to the documentation after the sentence “… which is otherwise set to ‘local’, which works for most setups.”
“Note: You must add a remote named ‘local’ with the storage type ‘Local hard drive’ to the rclone configuration in order to use Duplicati with rclone."