That's purely Robinhood's problem. And in fact that's because they weren't actually buying the shares like they said they were, otherwise there would be no problem.

If they locked trading...get this...this is my logic...then it is in fact FAIR to SAY that they locked trading. It's only complex because they were cheating their customers, hence the decline of the platform, hence this chain of posts, hence the end of this sentence having spoken my piece.