Realm options for the world is glitched and you can’t change anything

I am trying to get mods to work for my realm since my friend wants to see the mods and they already can’t join other players worlds for an odd reason of failed to connect but whenever I go into the world options for the realm I can’t leave it and whenever I try to change something and reload minecraft it doesn’t save. When it says All done! It sends me back to the world options and doesn’t save and when I try again either it does the same thing or crashes the game

 

file size is “too big” to show a simple 9 second recording of my game crashing smh