Facebook Like button does not work.. Help?

I have the plugin Simple Facebook Like Widget and it does not work. it says error when you click like on my page and when you click error this message will appear:

“Your page’s type requires that a meta tag of the form <meta property=”og:image” …> be present. ”

I do not know what that means or how to fix it, so I went to https://developers.facebook.com/tools/lint and typed in my url and this appeared:

Warning
Required Property Missing og:title is required
Required Property Missing og:type is required
Required Property Missing og:url is required
Required Property Missing og:image is required
Name instead of Property You used <meta name=”language” /> instead of <meta property=”og:language” />

Info
Description <meta property=
Image
Title Who is Forrest Miller
Site URL http://whoisforrestmiller.com/
URL http://whoisforrestmiller.com/
Canonical URL http://whoisforrestmiller.com/

Debug
Data Source “Who is Forrest Miller” extracted from <title>
Data Source “<meta property=” extracted from <meta name=”description” />
Data Source “All images” extracted from all <img> nodes
Data Source “en” extracted from <meta name=”language” />