Google Indexing Error: The mandatory text inside tag 'head > style[amp-boilerplate]' is missing or incorrect.

[motwguy]

I am seeing this error in Google Search Console:
The mandatory text inside tag 'head > style[amp-boilerplate]' is missing or incorrect.

Looking at the page source, I am unable to find this code or where it may be in the amp templates.
Does it exist? Is there a syntax problem? Does it just need to be added, if so where?

[motwguy]

crickets...