Plugin works fine with FB and G+, but fails with LinkedIn.
I have run the OG checker on one of my posts http://ogp.spypixel.com/Pogo/checker/index.php?url=http%3A%2F%2Fwww.akhmadi-invest.com%2F2014%2F01%2F20%2Ftrebovanie-prezidenta-rk-k-venchurnomu-finansirovaniyu%2F and it gave me 2 errors:
1. og_namespace_undeclared Document uses but does not declare the og: namespace. Couldn't find xmlns:og in the document.
2. missing_required_property One or more required properties (og:title, og:type, og:url, og:image) are missing. Technically we are missing all properties, since xmlns:og is undeclared.
How can I fix it?
Waiting for your reply.