Title: Google Tag Manager Debug Window
Last modified: June 26, 2019

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# Google Tag Manager Debug Window

 *  [savvymatt](https://wordpress.org/support/users/savvymatt/)
 * (@savvymatt)
 * [6 years, 10 months ago](https://wordpress.org/support/topic/google-tag-manager-debug-window/)
 * The GTM Debug window is not loading on the site when in preview mode.
 * The plugin was implemented by a third party and I am not sure if it was done 
   correctly or maybe rendering the debug window incorrectly?
 * Assistance would be greatly appreciated!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fgoogle-tag-manager-debug-window%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Thomas Geiger](https://wordpress.org/support/users/duracelltomi/)
 * (@duracelltomi)
 * [6 years, 10 months ago](https://wordpress.org/support/topic/google-tag-manager-debug-window/#post-11675124)
 * Hi,
 * Your site is using content security policies to restrict where the site can load
   3rd party content (like the preview panel of GTM).
    You can read more about this
   technology here: [https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP)
 * GTM needs some addition into your CSP rules that is described in this article:
   
   [https://www.simoahava.com/analytics/google-tag-manager-content-security-policy/](https://www.simoahava.com/analytics/google-tag-manager-content-security-policy/)
 * If you resolve this, the preview panel will show but this is not a issue related
   to GTM4WP

Viewing 1 replies (of 1 total)

The topic ‘Google Tag Manager Debug Window’ is closed to new replies.

 * ![](https://ps.w.org/duracelltomi-google-tag-manager/assets/icon-256x256.png?
   rev=1708451)
 * [GTM4WP - A Google Tag Manager (GTM) plugin for WordPress](https://wordpress.org/plugins/duracelltomi-google-tag-manager/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/duracelltomi-google-tag-manager/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/duracelltomi-google-tag-manager/)
 * [Active Topics](https://wordpress.org/support/plugin/duracelltomi-google-tag-manager/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/duracelltomi-google-tag-manager/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/duracelltomi-google-tag-manager/reviews/)

## Tags

 * [gtm](https://wordpress.org/support/topic-tag/gtm/)
 * [preview mode](https://wordpress.org/support/topic-tag/preview-mode/)

 * 1 reply
 * 2 participants
 * Last reply from: [Thomas Geiger](https://wordpress.org/support/users/duracelltomi/)
 * Last activity: [6 years, 10 months ago](https://wordpress.org/support/topic/google-tag-manager-debug-window/#post-11675124)
 * Status: not a support question