Failed to copy your world

I’m using Minecraft bedrock edition, my world is on experimental mode. After I added a certain shader everyone had called “realistic shaders” I couldn’t copy the world, I tried other versions of this world before I added the shaders and it copied very easily. After I searched for the problem I found out other people has resources packs or behavior packs on this world. I want this bug to be solved soon as possible( if you can )  because I got a friend waiting for it please!