post to facebook no images

Hi Guys,

lately when posting events and using post to facebook i got no image shown on the facebook post

i used facebook debug tool and got the following :

Missing Required Property
The ‘og:type’ property is required, but not present.
Inferred Property
The ‘og:url’ 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.

could you please help?
Thank you,
Pat