Shifter supports AMP with "AMP for WordPress" plugin By WordPress.com VIP, XWP, Google, and contributors, and doesn't support any other AMP generator plugins like AMP for WP – Accelerated Mobile Pages or Better AMP.
It means if you enabled unsupported AMP plugin and generated your site, AMP pages will not generate.
Please use "AMP for WordPress" plugin instead of the alternatives.
The latest version of AMP plugin supports three modes, Standard, Transitional and Reader. If your theme supports AMP, we recommend to select the Reader.
Choose AMP Legacy
Check on Posts, Pages, Media as you like.
Shifter currently supports only Posts, Pages and Media.
Redirect mobile visotors to AMP
Turn off this feature, Shifter currently doesn't support it.
Set as you like.
You can set Analytics code such as Google Universal Analytics.
Refer to official document Analytics Vendors to check your vendor is supported.
AMP pages on Shifter should be end with