# Received CORS issue trying to reproduce quickstart demo in Rails

**URL:** <https://community.auth0.com/t/received-cors-issue-trying-to-reproduce-quickstart-demo-in-rails/60143>\
**Category:** Get Help\
**Tags:** rails, cors\
**Created:** [March 26, 2021, 8:28pm UTC](https://community.auth0.com/t/received-cors-issue-trying-to-reproduce-quickstart-demo-in-rails/60143 "2021-03-26T20:28:33Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![nils](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/nils/32/20401_2.png) [@nils](https://community.auth0.com/u/nils)\
**Post date:** [April 6, 2021, 4:14am UTC](https://community.auth0.com/t/received-cors-issue-trying-to-reproduce-quickstart-demo-in-rails/60143/3 "2021-04-06T04:14:37Z")

</div>

Yes, it’s made by an SDK.  
In this case:

```auto
gem 'omniauth-auth0', '~> 2.5'
gem 'omniauth-rails_csrf_protection', '~> 0.1' 

```

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_[View the full topic](https://community.auth0.com/t/received-cors-issue-trying-to-reproduce-quickstart-demo-in-rails/60143)._