Comment by Gracana

FYI your domain is marked "newly seen" on cloudflare, which results in it being blocked by Ubiquiti Unifi domain filtering.

  $ dig NS naturalsystems.io @1.1.1.1
  [...]
  ;; WARNING: recursion requested but not available
  [...]
  ;; AUTHORITY SECTION:
  naturalsystems.io.      3600    IN      SOA     block.unifi.local. 0. 7200 900 1209600 86400 0

You can submit to have it re-categorized using the link below.

https://radar.cloudflare.com/domains/feedback/naturalsystems...