google annotation images doesn't render

Images are ratio 1:1 as per Google's requirement, none of the test will render those

   %%[
    SET @JSONStart = Concat('<', 'script type="', 'application/ld+json"','>')
    SET @JSONEnd = Concat('<','/','script','>')
    ]%%
    %%=TreatAsContent(@JSONStart)=%%
      [
      // Build the first image preview in your product carousel:
      {
        "@context": "http://schema.org/",
        "@type": "PromotionCard",
        "image": "https://image.emails.asda.com/lib/fe2f11737364047f771278/m/1/g-180823-1a.jpg",
        "url": "https://www.google.co.uk/"
      },
      // Build the second image preview in your product carousel:
      {
        "@context": "http://schema.org/",
        "@type": "PromotionCard",
        "image": "https://image.emails.asda.com/lib/fe2f11737364047f771278/m/1/g-180823-2a.jpg",
        "url": "https://www.google.co.uk/"
      }
     ]
    %%=TreatAsContent(#Sales Cloud #Salesforce Developer #Service Cloud #Marketing Cloud