I am doing a quest that requires you to use the platforms to jump to the big cage, however, when I go to the first jumping platform on the floor, it just throws me back to the entrance. Did the location of the platforms change?
That doesn’t sound like something in the vanilla game - there are no jumping platforms or big cage. If memory serves, I think that was something in Age of Calamitous. Might be worth checking their discord (or whichever mod it does come from, if it’s not AoC).
I think @DanQuixote is right. Do you have Scourge Spiders in the passage between Jungle and mountains? Then you want to ask in the AoC Discord.