I cant join private servers please help

I CANNOT JOIN PRIVATE SERVERS :(

1- I am over 13. My age is literally verified. 2- I have “allow vip servers” or whatever on in privacy. So, every time I click on a private server link on mobile, from Discord, it takes me to the app but doesn’t LAUNCH THE GAME. Like it just stays on the home screen. What do I do? It used to work yesterday but suddenly stopped.