Replit agent - server IP address could not be found

I have been working with the Replit Agent this morning and found whatever I build, ranging from a flask application to a simple html page showing the word test I am getting the exact same type of error message:

xxxx.riker.repl.co’s server IP address could not be found

Anybody else have this? It was working fine on the same networks a few weeks ago

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You will need to change repl.co of the URL to replit.dev to access the website. If that fails, your ISP or firewall is blocking the replit.dev domain. You will have to whitelist the domain.