@zotezo There are different modes to choose from using the plugin. Reader
mode provides a basic template to ensure AMP compatibility. It disregards your active themes appearance works best for themes are not AMP compatible. Some themes, such as ReHub have their own styling using this mode, but your AMP URLs don’t match your non AMP in appearance.
Transitional
mode AMP is a better solution for various reasons. It uses your themes styles and appearance, so there is little or no visual differences between your AMP and non AMP. Your category pages can also be AMP, and your widget areas will also show in AMP. Some themes feature custom JavaScript and other features that are not AMP compatible. This is most likely what you are encountering, so you can perform one of the following:
– Use the plugins validation tool to accept or reject any error
– Use an AMP compatible theme
– Enquire with your theme developer about transitional AMP support
You can find out more about the different modes on the plugins website.