Yes, I get a 403 error too, same when trying to access the top-level website. Probably my 3rd world country is blacklisted by eXtreme Hosting.
I took a look at the generated .rsc as posted by @Buckeye and I think the IPv6 part will cause issue with 7.23 & 7.24 due to this:
From 7.23+, options like DNS should no longer be advertised on the entry with the all interface, or there will be big problems. Version 7.24 only pauses the RA spamming when upgraded from older version, but not when you make change to the setting and save afterwards (what the script above will do).
It would be better to turn off everything on the interface=all entry and create individual /ipv6 nd entries for each of the LAN interfaces instead.
add-default-route=yes is a hack from MikroTik (DHCPv6 has no default gateway information). It would be better if the configuration disables that and enable accept-router-advertisements (normally also not needed for P2P interfaces like PPPoE client that already have their own add-default-route=yes) and set the accept-router-advertisements-on parameter to the proper WAN interface list instead.
This is something I find very much useless. You are only wasting resources tracking stuffs that are dropped anyway, with no improvements whatever, because your drop rule is still in the firewall filter table.
Same with these rules.