I have run the test and found others likely have the same problem due to Sucuri's "BLACK02" blacklisting.
See route report here https://airvpn.org/routes/?q=https%3A%2F%2Flabs.sucuri.net%2Fsignatures%2Fwaf%2Fblack02-blacklisted-ip-address%2F
and browser from denied sites:
Access Denied - Sucuri Website Firewall
If you are the site owner (or you manage this site), please whitelist your IP or if you think this block is an error please open a support ticket and make sure to include