Can't use Origins mod in realm - can't import world to realm

So I'm trying to add the Origins mod for my SMP that started on discord, I'm hosting it on one of my 2 realms, and 1) they said to unlock Creator Holiday Mods or something (I dont remember what it is exactly) but they don't have that area for realm settings, only in world settings. so what i tried to do was make a world, unlock what i had to, then export it into the realm-- HOWEVER, it gave me a screen saying "Error - We couldn't pack your world file for upload. Maybe your hard drive is full?" I don't know what that means but I tried resetting data on my switch and on minecraft, and it still gave me the same message. :/ idk what to do at this point. help </3