Thanks for your reprot. This seem to happen inside Rclone<>Proton integration and there isn't much S3Drive can do at this stage. If you feel like please report it here: https://github.com/henrybear327/Proton-API-Bridge/issues and provide some info when it happens (e.g. during what sync mode) etc.(edited)
Hi. I am getting exact the same error, code and status. I dragged 1 file into the S3 App, to make its way to a fully empty Proton Drive. Saying: I am not syncing, just trying to upload 1 file into Proton Drive. I understand its between Rclone<>Proton. rclone config currently does not work as well (perhaps for the same reason). Does this mean that Proton Drive is -currently- not supported by S3 App?(edited)
I am sorry to say that, but there are ongoing discussion to actually mark Proton Drive as unsupported: https://github.com/rclone/rclone/issues/8873
It seems some users experience issues, some not and not much we can do before Proton releases SDK, but I have no idea how far they're into this: https://proton.me/blog/proton-drive-sdk-preview (judging by previous deliveries I think it would be great success if they can deliver it in 2026, but I am doubtful)
