Georgia State \ Unable to reach internet/can't resolve DNS

dash-dns
dns-resolver
#1

I have used 1.1.1.1 for over a year as my DNS resolver and have it set up on my Mac. Starting today I was unable to reach the internet at my school (Georgia State University, located in Atlanta, Ga). I got the error(s) shown below. I updated my browser, restarted and shut down my Mac to no avail.
I then reset my DNS settings and was able to reach the internet. Below is the cloudflare help tool ran with the reset DNS settings. I could not run it with 1.1.1.1 settings. Also checked https://www.cloudflarestatus.com/ says everything is fine. Help?

#2

Update: Downloaded the app (1.1.1.1) on my iPhone, internet works fine (connected to same wifi as Mac)

#3

Try flushing your DNS cache.
lookupd –flushcache

#4

It looks like 1.1.1.1 is being blocked for DNS. I would try using 8.8.8.8 or setting up DoH or DoT on your Mac.
Your iPhone works with the app because DNS in encrypted.