Hello,
The Microsoft Credentials forum would be a more suitable place to ask this question: Results in Microsoft Credentials - Training, Certification, and Program Support
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The information provided below might be relevant:
What should I do if the Azure portal or the Microsoft 365 admin center does NOT open immediately?
If your lab launches with a blank white screen, or an authentication error in one of the portals, try opening a new tab and navigating to https://portal.azure.com or https://admin.microsoft.com/ in the virtual machine. Make sure you do this in the virtual machine; we will NOT be able to score your work if you open the portal on your machine rather than the virtual machine. Opening the portal in this way will resolve the issue most of the time.
For additional lab-related concerns, please refer to: Assessment lab frequently asked questions | Microsoft Learn
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