I need to check if Googlebot can see my image thumbnails. When I use the URL Inspection Tool, Google cannot see my images in the page. In the rendered screen shot, it displays a black box instead of thumbnails.
Also my thumbnails dropped in SERP.
This is a sample URL:
And this is my thumbnail:
I need to check if Googlebot has access to the above URLs.
Note that robots.txt is OK and I checked the verifying Googlebbot page but it doesn't seem to be helpful for this situation.