Hello @richard1250
Thank you for confirming, As we checked your site you are currently using Sandboxing with Loose Mode, If one of plugin or your theme is incompatible with AMP it will generate into validation errors.( those red ones)
The Sandboxing Mode with Loose Mode will allows any invalidations (it will retain those validation errors) that are required for functionalities of your site. eg: javascript required to run slideshow, which will be retained on Sandboxing Mode
The focus of using Sandboxing is improve Page Experience (Which is considered a new factor when ranking sites) by using bento components where ever AMP plugin seeks opportunity to use bento component it will replace the slow performing element with bento components
eg: You have youtube embed on your page which take much to time to load, AMP plugin will replace it with bento component and improve it’s loading speed resulting in good page experience.
Regarding those errors those are just to inform you that there are some invalidations which can be removed to achieve Strict AMP. If you are sticking to Sandboxing Mode you can ignore them.
You can learn more about Sandboxing Mode in our documentation
Let me know if you have further questions.