I can't log into myfreecodecamp

I tried logging into my free code camp and it says enter your email(yahoo) and the code. When I do that it says server can’t be found. I have tried on my safari and google chrome. I even saw somewhere where it says to log into you gmail. So i made a gmail account and i change my email to login (I have an iPhone and I can log into my phone) but for some reason I can’t log into my account on my laptop

It says this
“The requested URL /UverseAccount.html was not found on this server.”
every time. I even tried incognito

on my google chrome its says (When i click inspect):

(this is highlighted yellow) UverseAccount.html:1 The SSL certificate used to load resources from https://myattwg.att.com will be distrusted in M70. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information.

(These are highlighted red)favicon.ico:1 Failed to load resource: the server responded with a status of 404 (Not Found)

(these are highlighted red)UverseAccount.html:1 Failed to load resource: the server responded with a status of 404 (Not Found)