I have a fresh installation of 2.14.3 with a very minimal theme installed. I’ve done nothing (not sure if I even can) with AMP. Google webmaster tools is giving me a warning on one of my posts. It is throwing a Warning. Not an an Error.
The warning is: Error in required structured data element
Ghost was installed using the one click app on Digital Ocean. Not quite sure how to go about fixing it or looking further into it.
The reason you’re getting a warning / error is because you don’t have an image - here are the structured data validation results. Scrolling to the bottom of the right side pane will show the error / warning.