I get the message "Properly size images" when using SPAI, how come?

If you installed ShortPixel Adaptive Images (SPAI), ran a GTMetrix test on your website and received such an error,

then it is very likely that another plugin or theme is conflicting with ShortPixel thus preventing it from working correctly. Whether this is your case or not, here's how you can try to solve this:

  1. First of all, make sure there isn't a firewall or .htaccess rule preventing ShortPixel servers from accessing the original images. If so please make sure you whitelist ShortPixel's IP addresses.
  2. SPAI is using lazy load technology so it can deliver appropriately sized images depending on the visitor's viewport. If another plugin or theme has a similar lazy load functionality active the you need to turn it off so that SPAI's lazy load can work properly. Here's an article about known plugins that have such functionality and how to deactivate it.
  3. You should also make sure to lazy load (using ShortPixel AI, of course) all kind of images: background images, images in JS blocks and images in JSON URLs. Remember that scaled images require lazy loading, so try to follow these instructions, as both WebP and scaled images require lazy loading.
  4. If none of the above helps then you can try to debug this step-by-step:
    1. go to your website, and click F12 to open the Developer tools
    2. go to the Network tab
    3. reload the page
    4. check whether you can see calls made to cdn.shortpixel.ai as in the screenshot below. If you can see "cdn.shortpixel.ai", then ShortPixel Adaptive Images works well.
    5. if you cannot see such calls to "cdn.shortpixel.ai" on a page with images then go to your WordPress Dashboard, select Plugins and temporarily deactivate all your plugins. After that, just activate ShortPixel Adaptive Images and make sure the images are served from ShortPixel's CDN (see previous step).
    6. Activate, one by one, each of the other plugins and after each plugin activation, reload the test page and repeat step d until you notice that the images aren't loaded from our CDN anymore. When that happens, it means that you have found the plugin conflicting with SPAI. Congratulations! :-)
    7. Keep the conflicting plugin deactivated, activate all the other plugins that you need and make sure that SPAI is still working as explained in step d.
    8. if the conflicting plugin isn't important for your website then just keep it deactivated. If it is important, then please contact us letting us know what is the conflicting plugin so we can further investigate this and possibly find a fix.
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