https://github.com/pi-hole/ftl/releases/latest/download/pihole-FTL-linux-x86_64 not found

[yubiuser]

Look here, similar issue:

Can't update from 5.0, claims can't get update file but I can get it via wget

There's some external connectivity issues going on. The Pi-hole DNS is working since the domain was able to be resolved. This error is showing the connection attempt was blocked by the endpoint. What does the output from curl -IL https://github.com/pi-hole/ftl/releases/latest/download/pihole-FTL-linux-x86_64 show? You may see a 403 Forbidden notice but that is expected.