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Azure Application Gateway
An Azure service that provides a platform-managed, scalable, and highly available application delivery controller as a service.
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Hi Wendy LOOMES
Thanks for using the Q&A platform.
The above error message you’re seeing typically isn't an actual error message, but rather a default response header or placeholder page coming from an Azure Application Gateway.
You’re likely hitting an Azure Application Gateway backend where the backend pool (website) is down, the AppGW health probes are failing, or a custom error page is not configured, so Azure returns a default placeholder with the string microsoft-azure-application-gateway/v2.
Since this error is coming from the server side (the App Gateway in front of the training website), there’s nothing you can fix from your end.
Try contacting the support team of the training website and inform them.
If the response was helpful, please feel free to mark it as “Accepted Answer” and consider giving it an upvote. This also benefits others in the community.
Regards,
Obinna.