Only if you changed your DNS, which can take up to 24 hours (or more) to propagate across the entire internet
Someone in the Discord had this issue, turns out they had Firewall blocked Amazon AWS.
So
- check your GET handler is working, and web accessible
- check that you haven’t done anything weird with Firewalls
- check your SSL cert is still good and valid
Things are fine with my hook handler, so it’s definitely something yourside