Solution for me:

--- a/src/meta/tags.js +++ b/src/meta/tags.js @@ -29,6 +29,9 @@ module.exports = function(Meta) { property: 'og:site_name', content: Meta.config.title || 'NodeBB' }, { + property: 'og:type', + content: 'website' + }, { name: 'keywords', content: Meta.config.keywords || ''