Earlier today, some users in Australia were unable to render Azure AD B2C’s sign in pages due to a local CDN (aspnetcdn.com) returning incorrect content. The issue has been mitigated. Specifically, the issue was caused by an incorrect content-type being returned when the client fetched JQuery. The engineering team deployed a fix to mitigate the issue and is continuing to monitor the situation. If you are still facing this issue, please contact Azure Support.