The "Using the <PICTURE> tag syntax" option doesn't work; WebP images won't show up

The Using the <PICTURE> tag syntax option replaces the <img> tags with <picture> tags so ShortPixel can deliver WebP files correctly. We are talking about one of the two options you can use to deliver WebP images on your site. It is located on Settings > ShortPixel > Advanced > WebP Images:

There could be a few possible explanations why this feature doesn't work:

• The WebP version of the original image was not created when running ShortPixel Image Optimizer. Please check this article: I optimized already all the images but then I realized that I didn't select the option to generate WebP, what can I do?
• The images are served via JavaScript mechanisms.
• A cache solution is serving old pages. It can be your browser's cache, your hosting's cache, your CDN's cache or a cache plugin for your site. Try clearing all of them.
• You used a page builder for page creation. Currently, our feature doesn't work well with pages created with some of these tools.
• You've got a Windows Plesk server. You will have to add a MIME type on your server for .webp extensions ==> image/webp .webp

If none of these is true for your case, then you could try an alternative solution for serving WebP images like ShortPixel Adaptive Images or contact us to investigate your case.