Restoring Missing Thumbnail Images in Portfolio Presentation After Regenerating Thumbnails
To have square images in the portfolio presentation, I had to regenerate the thumbnails. Since then, many thumbnail images (featured images of posts and products) are missing. How can I restore this? I'm afraid regenerating the thumbnails might worsen the problem.
With the Force Regenerate Thumbnails plugin, you can choose images to regenerate.
In the Media library, choose list view, and when you hover over an image, you can find an option to do that.
Please regenerate media that are missing, and recheck that.