Failed to load resource: the server responded with a status of 503 ()

Hello, since 09/27/23, I’ve been unable to connect to GPT-4 and see a blank page when attempting to login. The traffic is being allowed through our firewall. The error message in the console is “Failed to load resource: the server responded with a status of 503 ()”.

Is there any assistance that Chat GPT can provide to resolve this issue?
thank you
Sophie