Why can't I sign in to my Apple Account to create an app-specific password for notarization?

If you’ve not already done so, and given it’s related to code signing, contact Apple Developer Support.

Support - Apple Developer

Looks like all the servers are running, though there is some maintenance planned on 10-May.

System Status - Apple Developer

The developer support folks are also more likely to read postings over in the developer forums, not so much around here in the end-user forums. Here is the code-signing forum:

Apple Developer Forums

PS: If there are any “coffee shop” VPN clients installed, remove all of them, restart, and try again.

Hi, have you got any solution?

I have the same "the website hangs (during the "load" animation") after I enter correctly my credentials and two-factor authentication code". Tried everything you mentioned too.

Thx

Same here! This is unbelievable, it’s already days like that