The entrance to the zone where you could claim the Opera GX rewards has suddenly disappeared.

The same thing has happened with the "Hitman" NPC; the spot where you could collect those rewards is gone.

I’m not sure exactly what’s going on. I don't think the Slap Battles event has ended, as the "Rewards" window still indicates it's available, and I have outstanding rewards that I’d like to claim. (Apologies for the language on screenshot)

Thanks to anyone who can help, and have a great day.
(If you are facing the same problem, please lmk)