Azure web app: Failed to load resource: net::ERR_BLOCKED_BY_CLIENT on az416426.vo.msecnd.net/scripts/a/ai.0.js

Question

Hi,

I am running into the below error when my Azure web app is loading various pages. This all worked fine before and started failing today and I have made no changes to my web app:

Failed to load resource: net::ERR_BLOCKED_BY_CLIENT on https://az416426.vo.msecnd.net/scripts/a/ai.0.js

Note I can access https://az416426.vo.msecnd.net/scripts/a/ai.0.js from my dev machine fine but when accessing my Azure web app url I see this failure in Chrome console.

Has something changed on the Azure side? I am using Application Insights with my web app and would like to keep using. How to fix this issue?

Thanks,

Don

Answer 1

@Don , Thanks for posting this question. Apologies you're experience this issue.

Kindy see if it’s due to JavaScript CDN block. Checkout the suggestions outlined in this doc –‘sections’ below:

‘The Application Insights JavaScript CDN has been blocked’
‘Application Insights JavaScript CDN is blocked (by end user - blocked by browser; installed blocker; personal firewall)’

As the snippet and its configuration are returned by your application as part of each generated page, you can change the snippet src configuration to use a different URL for the SDK. By using this approach, you could bypass the CDN blocked issue as the new URL should not be blocked, see if this helps.

Current Application Insights JavaScript SDK CDN endpoints

https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js
https://js.monitor.azure.com/scripts/b/ai.2.min.js