AMP/ The tag ‘noscript enclosure for boilerplate’ appears more than once in the

Hi folks,
I have an ecommerce site https://www.themilitarycampaign.co.uk

and I’m getting these error messages:

Linked AMP version is invalid

The tag ‘meta name=viewport’ appears more than once in the document.

The tag ‘noscript enclosure for boilerplate appears more than once in the document.

Only amp-boilerplate and amp-custom “style” tags are allowed, and only in the document head.

This is a link to the amp page https://www.themilitarycampaign.co.uk/product/india-medal-group-seaforth-highlanders/?amp

And this is a link to the actual page https://www.themilitarycampaign.co.uk/product/india-medal-group-seaforth-highlanders/

At the moment the are 95 pages all with the same errors.
I have searched the forum for the same problem and have found a few but the only reason I have started this new topic is because I’m a total novice and I’m not the brightest spark in the box so if anyone can help me could you put it in very layman’s terms, so that I can understand it “if that’s possible”.
thanks for understanding and very kind regards.
Kev.
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