404 on social media

If I post this page Help my bike has been stolen to a Facebook or Twitter page, the preview comes up as a 404. Does anyone have any idea why, or know how to fix it please?

I’m only on my iPad, but if you use the FB Dev Tools you will see your Canonical URL is wrong….

Yes I would definitely check these in the FB and Twitter Card Deve tools, but having a quick look at your page source it doesn’t look like you have added data for Twitter Card or Facebook OpenGraph. If you are using Blocs 4 that is a tick box option but it can also be added manually in Blocs 3 using code. These would likely help your presentation and could be checked with the dev tools.

Thanks Flashman and Malachiman. Will take a look.