Facebook sharer keeps showing 404 on my jekyll blog

Question

I used to have the permalink set as follows:

/:categories/:year/:title/

But to shorten the link I decided to set it like that:

/:title/

The strange thing that happens is that although facebook sharer sees the proper link, it does not display it and each click on facebook share button looks like this:

But when I share it to my timeline, it keeps showing 404 but when clicked it directs to the right page.

It looks like a facebook issue, since twitter sharer does not seem to have such problems.

Have you ever encountered such issue and know how to fix it? Thanks in advance

Answer 1

fetch new scrape information

https://developers.facebook.com/tools/debug/

solves the issue