dahituc

Yes the images are uploaded on the same domain of wordpress insatllation, and are added on featured post.

The images are no external lnks.

Got no error on the WP_DEBUG_LOG file.

I have also used another plugin “Recent Posts Widget With Thumbnails”, it is also using the same base64 encoded src for the same image, but that image is visible.

I have been checking the settings and all is ok,

As you have recommended, I removed the older widget and creted new one. the same issues still exists.