Thanks for the update! I appreciate you testing things on your end.
Based on what you mentioned, the 500 error could be related to some internal function issue. I’d recommend checking the logs in the Azure portal or Application Insights to see if there’s more info on what's going wrong.
Also, regarding the warning about the authentication token, it sounds like your function requires a key to trigger. You can find the full URL with the token in the Azure Functions explorer or the portal and use that for testing.
Since the extension is set up, it seems like the issue might be more with the function itself or the app settings. If you can, double-check those and let me know if anything stands out.
Let me know how it goes, or if you need any more help!