It seems that there is a weird issue between carry on and Dragon Survival. The issue is that we can't pick up other players, Carry On tries to do it but instead of carrying it's like we immediately drop the player or they immediately hop off. It works as intended with everything else.

I am on minecraft 1.20.1; forge 47.3.0 and have only Carry On and Dragon Survival installed for the demonstration.

Here's a little clip to illustrate, apologies for the quality dunno what that was about but can't get it to look better with the 10mb limit.