# I keep receiving an Auth0 SDK error

**URL:** <https://community.auth0.com/t/i-keep-receiving-an-auth0-sdk-error/188757>\
**Category:** Get Help\
**Tags:** auth0-spa-js, sdks-quickstarts\
**Created:** [July 4, 2025, 11:13am UTC](https://community.auth0.com/t/i-keep-receiving-an-auth0-sdk-error/188757 "2025-07-04T11:13:35Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![junoswift13](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/junoswift13/32/75570_2.png) [@junoswift13](https://community.auth0.com/u/junoswift13)\
**Post date:** [July 4, 2025, 11:13am UTC](https://community.auth0.com/t/i-keep-receiving-an-auth0-sdk-error/188757/1 "2025-07-04T11:13:35Z")

</div>

Hi Auth0 Community,

I’m currently integrating the Auth0 SPA SDK into a local project, but I’m consistently running into an issue where the SDK fails to load. Here’s what’s happening:

### Issue:

The following error appears in the browser console:

```auto
Auth0 SDK failed to load
(index.html:60)

```

When inspecting the request, I see a **403 Forbidden** on:

```auto
https://cdn.auth0.com/js/auth0-spa-js/1.26/auth0-spa-js.production.js

```

I also tried:

- `https://cdn.auth0.com/js/auth0-spa-js/2.0/auth0-spa-js.production.js`
- `https://cdn.jsdelivr.net/npm/@auth0/auth0-spa-js/dist/auth0-spa-js.production.js`

But either get 403 errors or the SDK still doesn’t load properly.

### What I’ve tried:

- Switched to jsDelivr CDN (same result)
- Used a local server (`python3 -m http.server 8080`)
- Tried different browsers (Chrome, Firefox)
- Disabled ad blockers, VPNs, privacy extensions
- Tried loading the SDK directly in the browser (also failed or 403)
- Attempted offline usage by downloading the script manually (no success)
- Network seems fine otherwise

### My Question:

Is there a new preferred CDN link or a configuration I’m missing?  
Are there IP blocks or region issues I should be aware of?

Any advice or a working, current SDK URL would be super helpful. Thanks in advance!

* * *

**Environment:**  
Local testing environment HTML + JS (no framework)  
Tenant: dev-tnhr6w3ixu052ugm

---

<div class="post-metadata">

**Author:** ![nik.baleca](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/nik.baleca/32/68749_2.png) [@nik.baleca](https://community.auth0.com/u/nik.baleca)\
**Post date:** [July 9, 2025, 7:12pm UTC](https://community.auth0.com/t/i-keep-receiving-an-auth0-sdk-error/188757/4 "2025-07-09T19:12:08Z")

</div>

Hi @junoswift13

Welcome to the Auth0 Community!

I am sorry about the delayed response to your inquiry!

Do you still have issues with the SDK installation?  
Have you tried installing it using npm? The command would be `npm install @auth0/auth0-spa-js`.  
Could you also try using this link with CDN: `https://cdn.auth0.com/js/auth0-spa-js/2.2/auth0-spa-js.production.js`

Kind Regards,  
Nik