GTM Google Tag Manager error: HTTP response code indicates tag failed to fire: S

GTM – Google Tag Manager – Works Correctly when using the PC version on:

https://www.gourmethjort.no/
https://www.bjornespray.no/

When using AMP for WP the following error message is displayed:

HTTP response code indicates tag failed to fire: Status 403

https://www.gourmethjort.no/amp/
https://www.bjornespray.no/amp/

Testing on two different servers and two different websites.