Thank you for reaching out to us, The AMP plugin follows the AMP web component framework, which is required to be followed by third-party plugins to create an AMP valid page.
The AMP validation errors are generally created by plugins and themes which do not follow these validation standards, the AMP plugin simply marks them in Oder to help site users or developers to understand them
You can check the following video to understand about AMP validation errors.
What can you do?
1. Contact the respective plugin author and ask them to make their plugin AMP compatible.
2. Find an AMP compatible alternative for the plugin or theme from the ecosystem page.