The smaller prototype succeeded, but scaling it up might cause problems. I guess.
I had the chance to talk to one of the guys working on this on twitter a few months ago. He said “it is not intended to go ALL the way into space and back”. So I asked what good is it for then? He said for “high altitude high dollar joy rides”.lol
Then I told him I thought they were already taking their investors for a “joy ride” and he never came back. :)