Your Api is probably temp banned. I've had it happen so many times lately. What you can do is give your main dockers an own mount and Api. I've done this for Plex, Bazarr, Radarr and the rest. So 4 unionfs pointing to the same folders but through different apis.
What you need to do is just make a new Api and new rclone mounts. You can use the same local folders in your unionfs, but the different mount. And then in the docker settings point them to the seperate union folders.
If you don't understand what I mean, let me know!