Is that error related to your domain/website or Cloudflare dashboard or the owner of this Website is someone else?
Have you blocked yourself from accessing your Website?
Have you found your requests/IP address/country/ASN number/User-agent at Firewall events at Cloudflare dashboard?
Moreover, for an error 1020, may this one help you?:
Maybe someone else is using Firewall rules to block specific things like users from specific countries, etc. In that case, neither the Community nor Cloudflare Customer Support can do anything to alter the settings created by the site owner. It’s their site and they determine what traffic they allow or don’t allow.
Or, try using a VPN connection (having an outgoing IP address with some other country) would give you the access to that or some other Website.