My friends cant join me on the old version of Minecraft

Since the new version of Minecraft came out on the Ps4, my friends can't join my World. We have reinstalled the game several times and tried everything else, but without success. The only friend I can play with is the one I shared the game with. As soon as my other friends try to join my world, the message comes: No connection to the world. When we go to the old version of Minecraft does everything work. This has been going on for several months. I hope you can help me.