I cannot access my panel, all my web works, except the panel, I am including the domain and the port correctly, it is ruled out that this is the error.
Only the browser page appears telling me that it is impossible to connect to that page.

I reinstalled the panel and it only works with the server IP, but when I use a url (panel.domain.com:8888/secret/) it doesn't work and I get the same error.

    I could fix it, instead of using a subdomain (panel.domain.com:8888/secret) use the domain only (domain.com:8888/secret) and it worked.

    It would be nice to check if this is a bug, before I would use the panel from a subdomain.

      8 months later

      I also have this same error I uninstall & reinstall aapanel 2 times also I uninstall and reinstall Centos 8 3 times , also i changed port but still get this same error. plz help me