Inferred Property: The 'og:image' property should be explicitly provided,

I started my website with the free version of supermag and everything was fine with the website, never for once had issues with open graph and stuff. I recently decided to upgrade to the pro version of the theme and thence the problem started. I have done everything I know to rectify this problem all to no avail. Each time I write a blog post, publish and share on social medias, only the link of the home page shows with no image and meta date.

I checked the problem using Facebook sharing debugger and got the following messages:

caution-solid Warnings That Should Be Fixed
Inferred Property
The ‘og:image’ property should be explicitly provided, even if a value can be inferred from other tags.
Share App ID Missing
The ‘fb:app_id’ property should be explicitly provided, Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog.
Inferred Property
The ‘og:image’ property should be explicitly provided, even if a value can be inferred from other tags.

I need support in solving this issue