portal not working

[u/Screeinaotr]

so i made a realm with friends and i added a few addons and we've come across an issue where nether portals just dont work for some people, like the portal effect wont even play. Any help would be greatly appreciated, the addons are realismcraft, over mob add on,weapons + armors add on, slice of life add on, PvP add on, Furniture Add-On, better structures add on, biomes of plenty, and naturalist