The pool is UG, I have DE filter.

The sweeper was working but not anymore and I see that there's no water coming from it's 'tail' which pushes the sweeper in the water. Still no suction from both of the skimmers. I checked the impeller and that's fine. I used a drain king to push water through the skimmer and I can see water coming out of the inlet in the SPA, but no suction at all from the skimmers.

What am I missing here...