The right-angle bend was a classic Bad Idea (remember: about half of graduating engineers are below average). The delicate traces eventually break.

A repair is possible, though. Conductive-ink pens that are used to repair PC boards work well to reconnect the broken segments. To prevent a recurrence, use a small bead of epoxy over the crease (after the ink has dried). The cable will no longer flex at the 90-degree bend. Carefully reassemble, and you should be good to go.