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Applies to Product -Power Pages


What’s happening?
Users are experiencing blank pages when loading the designer and preview in the Power Pages environment after migration. This issue may also occur when navigating to menus.


Reason:
The underlying cause of this is related to the custom CSS code, specifically an error indicating that "e.match is not a function." 


Resolution:

  1. Check Custom CSS: Review the custom CSS implementation to ensure it is correctly configured. Look for any errors related to the function e.match.
  2. Update Authentication Key: Confirm that the authentication key is not expired. If it is expired, renew the authentication key using the documentation provided by Microsoft.
  3. Run Site Checker: Use the site checker tool in the Power Platform admin center to identify any configuration issues. Pay attention to errors and failures reported by the tool.
  4. Restart the Portal: If issues persist, restart the portal and perform a cache purge to see if that resolves the blank page issue.
  5. Consult Documentation: Refer to the Microsoft documentation for managing CSS files and authentication keys for further guidance.
If the issue continues after following these steps, please provide additional details or screenshots to assist in further investigation.