Domain / website 403 error

Hi There! Quick question. I set up my domain in Adzilla and after it was created it doesn’t work right. When I click the link to take me there, I get an 403 Forbidden error? Why is this and why does it sometimes work? I’m going through the module on setting up my google ads campaign and when I get to the part of adding my domain I can’t go any further because of that error.

Also if I just type my website into the browser, it says sorry this site doesn’t seem to exist? What did I do wrong? Or what step may I have missed?

Help please and thank you!!!

Sandy