They crashed. Based on the occasional English commentary during the stream, they had an IMU failure, that recovered, but then a main engine failure right near the end of the descent. They got the engine online again, but just looking the speeds on the telemetry, it was too late.
https://news.ycombinator.com/item?id=19638357
https://www.nytimes.com/2019/04/11/science/israel-moon-landi...
> On the way down, the main engine cut out. The engine was successfully restarted, but then communications were cut off, and no more information was sent back.