Subdomain not Resolving IP blocked by

I have a subdomain that points to the same Digital Ocean droplet as my main domain. However, it is not resolving. I get server IP address could not be found. When I look it up in a DNS lookup, I see IP blocked by
All of my other sites are using the same droplet, and they are working.

It resolved. Probably just a propagation issue. I do not know if the note meant anything at all.