I have a website that do not preview Thumbnail when link share on facebook?

image of post is here in this link I have a website that do not preview Thumbnail when link share on Facebook? it show "bot verification" instead of thumbnail when link shared on Facebook. website url (www.wisegot.com)

I ran the facebook debug tool and I get the following error message:

Inferred Property The 'og:image' property should be explicitly provided, even if a value can be inferred from other tags. Missing Properties The following required properties are missing: og:url, og:type, og:title, og:image, og:description, fb:app_id