It's the usual nonsense, isn't it?
Somebody issues a challenge, saying no (gender critical) feminist/woman will debate them.
Various organisations offer to host the event. There's a queue of feminists/women reading to pick up the challenge gauntlet.
Challenger indulges in braggadocio. Is then prevailed upon by friends and allies not to lend the imprimatur of respectability to any discussion because it will lead to unspecified harms.
Challenger withdraws.
Starter for 10, Grace Lavery and Helen Joyce.