The tag ‘amp-ad extension script’ is missing or incorrect

We inspected the URL in the AMP validator and tested but did not get this error. Can you please check once by re-crawling your website in the AMP validator and let us know back the result? So that we will help you accordingly to resolve it.

Here is the reference tutorial of it: https://ampforwp.com/tutorials/article/how-to-send-for-recrawling-your-website-in-google-search-console/

Ok

How do I change this? https://www.digitalphablet.com/reviews/wordpress-starter-plan-review/amp/#:~:text=Digital%20Phablet-,%C2%A9%202019,-.%20All%20Rights%20Reserved.View

I see no option of changing this text.

Can you please let me know, where did you get this URL exactly?