The resource and behavior packs are not working

I’ve been trying to use resource and behavior packs, and 1st they don’t appear in game. 2nd, they always failed to load. I’ve tried deleting the game and downloading it again, singing in and out of my account with no results in fixing it. I’ve have the recent iOS and the recent update and I don’t understand why it won’t work. I’ve searched forums with no information that would help me. Another bug with my account is that whenever I try to join people, with the right settings and requirements it just says unable to connect to world.