She was not asked. She was invited, and then kicked out of buzzconf (said conference), and the motives are not clear.

Then he said there was some kind of harassment of which we don't have any proof except what he say.

Then the guy justifies the ban saying it is because of commercial reasons, but before that he said it was because of some mysterious people were not comfortable WITH THE BOYFRIEND (are we in china were we ban people because of their associations?). He changed the narrative. Ok, so which people? can he name them? are they anonymous? are they the guy's angry ex-girlfriend? (VERY likely) Do we have to believe him in this too?

That's many things to believe.