ah one of those "I have given essentially zero info and need you to help me fix it posts". They're always fun

Have you tried turning it off and on again?

Are you just getting set up for the first time? What's your setup look like? Have you published and approved subnet routers? There's nothing in this question that we can go off.

What device can't connect? Is it an Android phone?

I tried to restart it and still not workking, I am connected to the other devices and still cannot access Adguard Home or Jellyfin. What shall I check first?