Dropbox root 'External/85.Kxswo [ZM]': sync batch commit: failed to commit batch length 1: batch commit failed: Error in call to API function "files/upload_session/finish_batch:2": 400 Bad Request - Invalid path: INVALID_PATH

[sweh (Stephen Harris)]

This is possibly a GoLang bug or a Dropbox limitation. We've seen this before (e.g. April '21); The upload fails when the rclone copy command transfers a specific file