Cannot Access Multiple Azure Portal Blades

Written by James McDonald

September 28, 2023


You get a heap of errors similar to the following when trying to access different blades in Azure Portal

Error: Failed to retrieve the blade definition for 'VirtualMachinePropertiesBlade' from the server. self.importscripts failed


DNSFilter (or another DNS filter product) has blocked the domain.


Open up your browser Developer tools (For Chrome Click the Three Dot menu, then More Tools, then Developer Tools or Press Ctrl + Shift + i ) and then view the Console tab

Check for the URL’s of domains that are erroring out e.g.

Right click on the erroring URL and choose open in new tab. To confirm that it is DNSFilter causing the issue opening in a new tab should redirect you to a DNSFilter block page.

Once you confirm DNSFilter to be the issue log in to your DNSFilter Admin panel and add the domain to the Allow List. I put NOT DNSFilter will ask you to add the CNAME’s too. It’s a good idea to accept this recommendation or you might still have issues.


Submit a Comment

Your email address will not be published. Required fields are marked *

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

The reCAPTCHA verification period has expired. Please reload the page.

You May Also Like…