# Aborting! CDN must have a protocol specified

**URL:** <https://meta.discourse.org/t/aborting-cdn-must-have-a-protocol-specified/118210>\
**Category:** Product Support\
**Created:** [May 20, 2019, 12:27pm UTC](https://meta.discourse.org/t/aborting-cdn-must-have-a-protocol-specified/118210 "2019-05-20T12:27:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)\
**Post date:** [May 20, 2019, 12:30pm UTC](https://meta.discourse.org/t/aborting-cdn-must-have-a-protocol-specified/118210/2 "2019-05-20T12:30:57Z")

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Have you specified `DISCOURSE_CDN_URL` in your `app.yml` file? If so, make sure it has a protocol at the beginning (e.g. `https://`)

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_[View the full topic](https://meta.discourse.org/t/aborting-cdn-must-have-a-protocol-specified/118210)._