Dropbox permissions / changes?

Recently, all of our Dropbox-related scenarios stopped working. I reconnected Dropbox and that fixed many of them. However, now scenarios fail at the “upload” document stage with a “[409] path/no_write_permission/…” error message.

Within dropbox, I can’t see any way to add write permissions.

I tried to add a new connection and give that write permissions, but I didn’t get that choice either:

Any ideas of what may be happening and how we can fix it?

(Did Dropbox make changes recently that might have led to this break down? Also, I don’t believe we had that API call warning before. We are on a Standard business plan.)