This may have been since upgrading to MacOS Sierra.
I get a dialog:
Impossible to add notebook.
You don’t have permission to save the file “Personal (Local, Dropbox or Box)” in the folder “Outline”.
This happens every time, every notebook. If I copy out of Dropbox to a local folder it still says the same.
I have a second backup folder which also has a folder named XXX (Local, Dropbox or Box). If I try to open this then Outline hangs with the notebook shown in the left pane and a rotating icon.
I am worried I have lost all my notes.