I get a error from my dns and i need help

I made a dns for a pterodactyl panel , i installed , everything was ok and conected but when i want to reach the website where was the pterodactyl panel (a panel where u can host games on a vps or vds) i get a error This site can’t be reached.
I know that it isnt from me bc i have 2 domains and only 1 has this problem and my friends get the same problem and they are from another countrys.