Facebook showing page not found when sharing link
I'm sharing content from a website and every time I paste the link into Facebook it says 'page not found'.
Sometimes it works when I manually add the 'www.' in front of the URL in the address bar.
EXAMPLE
Shows page not found:
http://roundreviews.co.uk/reviews/speakers/native-union-monocle-speaker/
Works when you manually place www. in front:
www.roundreviews.co.uk/reviews/speakers/native-union-monocle-speaker/
I honestly have no I idea why it's doing this, any thoughts on how it can be fixed on the web side?
Also...
I have tried with the link below with both the www. and without yet it doesn't work with either of them, this is all very strange. This is the only link I have tried and it doesn't work with both:
www.roundreviews.co.uk/microphones/spark-digital-microphone/
Any help is much appreciated, thanks.
Answer
For me what it worked was to access the Facebook Debugger, as Goose said. I saw that the scrape was about 12 hours ago, looks like it fetches the first time and saves it as caché or whatsoever... What it worked for me is to debug the url, then click "fetch new scrape information" after the previous information has been shown. Hope it works!