Try removing the domain and re-add it on a hosting account here on InfinityFree with the “Addon Domains” section of the Control Panel. That should push the changes to the network, and should take at least 24 hours for the changes to be applied.
Also when did you add the site? If recently please wait for the dns to get updated, it usually takes up to 24 hrs for the domain to fully propagate. BTW did you also use Cloudflare?
My domain is not pointing to the wrong server i am very sure of that because i have other site that i manage, it’s more than 24 hours ago that i added it, it was actually working, then i installed wordpress and a new theme, it was in the process of customizing the new theme that this error just came up. When it was not working i tried Cloudflare