AWS Login Page shows "This site can’t be reached". However when using VPN, everthing works fine

I have used my AWS account many times last week and everything worked fine. Today I wanted to login again, but the login page was not available, showing me this URL: https://us-east-1.console.aws.amazon.com/cost-management/home?region=us-east-1#/startupError?code=_CE_Not_Ready_&title=_CE_Not_Ready_Title_ When I start the VPN connection however, AWS just works fine again. I have no idea why login into the AWS console only works via VPN. It's not laptop related, since I cannot login with my old laptop either. Something seems to fishy with my network / ip address. However, all other webpages are working just fine without VPN connection. Thanks in advance for answering my question.