Uneducated guess based on the call for a double-shot crossbow a friend owns: if it’s safe you can use it but you can’t use its repeating capabilities and should instead load each shot individually; the fact that it takes time to load a crossbow is part of the game balance, and for example being able to shoot someone and then shoot their mate who comes charging at you thinking it’ll take a few seconds before you can shoot them unbalances the way archery is meant to be fitting into the game.
But that’s not in any way your official call, I’m just a player, and you should email in for an official answer.
I believe the consistent call so far has been that repeating and other multi-shot crossbows can only be operated as single-shot weapons, manually loaded between each shot.