I'm reading og:image on facebook ogp but I can't see thumbnail

with cakePHP https://github.com/monsat/Ogp
I am configuring it using the .

1:If you look at the debugger, <meta property="og:image" content="http://[sample.com]/aaa/bbb.jpg"/> is loaded without any problems

2:title and appid, property are also fine

3:Cache cleared and re-scaped many times

4: The image size is big enough.

5—Previously, there was no problem.

However, when I shared it with the share button or pasted a link, thumbnails were not loaded at all.

If you have a similar error in the past and know how to solve it, please let me know.