Suddenly Ads stop working in AMP

1. Have you blocked any plugin in the amp plugin manager? there is no relation between amp plugin manager and ads. it has different functionality.
Ref tutorial: https://ampforwp.com/tutorials/article/what-is-ampforwp-plugin-manager-and-how-to-use-it/

2. I have checked the amp version of the website on the desktop and I didn’t see any ads over there.

3. I inspected your website, there is no ad code is loading (https://prnt.sc/14mday1 )
what ad code is you are adding. Can you please send that code here? So that we will have a look and let you know back.