I cannot go into my friend realms server

I can't enter my friend's server. There are only two people playing at the same time. Besides that, my friend tried to remove me and add me again. I didn't receive any invitation from him, but realms still shows 3\2 like in the photo and says I can't enter. It also keeps fetching realms. I don't understand what the problem is. I know you have been fixing realms recently, but now my friends can play but I can't. Is it because I am on iOS or something? Please help me solve it. Thank you.