# Embed comments via Javascript - Failed to load resource

**URL:** https://meta.discourse.org/t/embed-comments-via-javascript-failed-to-load-resource/153299
**Category:** Support
**Created:** [May 30, 2020, 9:58am UTC](https://meta.discourse.org/t/embed-comments-via-javascript-failed-to-load-resource/153299 "2020-05-30T09:58:23Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![shawnngtq](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/shawnngtq/32/182367_2.png) [@shawnngtq](https://meta.discourse.org/u/shawnngtq)
#### Post date: [May 30, 2020, 9:58am UTC](https://meta.discourse.org/t/embed-comments-via-javascript-failed-to-load-resource/153299/1 "2020-05-30T09:58:23Z")

</div>

Hi guys,

When I tried to embed discourse comments via Javascript, I see these errors from my browser console

**1st error from line 1 of `comments` file**

```plaintext
Failed to load resource: the server responded with a status of 400 ()

```

**2nd error from `embed-application-08a52625979d3d44aac8a2dedf5a1a662fec81ffe8a9ebc2e6eefb15b2980874.js` file**

```plaintext
Uncaught DOMException: Failed to execute 'postMessage' on 'Window': Invalid target origin '' in a call to 'postMessage'.
    at u (https://forum.MYDOMAINNAME.com/assets/embed-application-08a52625979d3d44aac8a2dedf5a1a662fec81ffe8a9ebc2e6eefb15b2980874.js:1:105)
    at window.onload (https://forum.MYDOMAINNAME.com/assets/embed-application-08a52625979d3d44aac8a2dedf5a1a662fec81ffe8a9ebc2e6eefb15b2980874.js:1:523)

```

From these 2 errors. I believe the problem is because the browser is unable to find the assets from the server.

This might be due to my setup:

- For my main application, it’s hosted by AWS EC2. All the static / assets files are stored inside AWS S3 folder, and fetched by my app via AWS cloudfront
- For discourse, I installed it in a different EC2 instance using docker image.
- Using AWS Route 53, I added an `A` file that redirects `forum.MYDOMAINNAME.com` to the discourse EC2 instance’s IP address

I embed the HTML & JS script inside my main app. When the code calls for the assets, since my main app (in a different EC2 instance) doesn’t contains the discourse’s asset files, error occurred.

If my assumption is correct. How should I fixed this? How can I store discourse’s assets inside S3, served by Cloudfront?

If my assumption is wrong. What do these errors mean and how can I fix them?

Thanks!