Cant connect to phone app

[Kasp767]

I'm a total newbie to jellyfin and if just started the server a few days ago and after the i tried to connect both my IOS device and my Android Tablet but on both devices say that "Could not connect to server" and i have turned on "Allow remote connections to this server" but it just wont work and i feel like i've tried everything i can think of.

[TheDreadPirate]

What OS is the server running? Are you able to connect from a browser on other devices? What address are you typing into the phone apps?