So what can I do to assist the debugging here? Next time I do this can I turn on more debugging info for you?
Or would it be enough for me to do an exact description of what happens?
To my initial guess it looks like the error coming back is incorrectly being interpreted as “connection fine, folder missing” as I am asked if I want to create a folder. This is my signal to hit cancel and flip the slashes.
(Sorry - can’t remember exactly what happens if I let Duplicati attempt to create the folder. I think it proceeds to tell me it created the folder and stumbles forward… but nothing was created and no access to OneDrive. This bit in brackets I’d need to check)