og:image not valid
sometime og:image
for display thumbnail is false (link from forum for example)
for example pages as gnome and kde
<meta property="og:image" content="/gnome.jpg">
good value is img/xxx/image.jpg
we can in layouts test if file exists and if not return manjaro.logo as this
note: compare-branch, also no display image in forum, we have
<meta property="og:image" content="//img/features/repositories.png">