Users can create account.journal.period but there's no editable view
In "Financial > Moves > Journal -Periods" menu entry the user can push the "New" button and a new record seems to be created but the user cannot modify it nor save it (because required values are not filled in).
I think that this happens because the action only specifies a read-only tree view even though the user has create access to the model. So sao, allows the creation of the record but then it cannot find a read/write view for it.
My guess is that it should be fixed in Sao which should prevent the user from clicking on "New" button if there's no editable view available.