Troubleshooting Media Issues

Image Optimization

If you are experiencing image optimization errors and you don't see the solution here, if you have a QUIC.cloud account, you can check your QUIC.cloud Dashboard at https://my.quic.cloud/dm/example.com/img_optm. (Be sure to replace example.com with your own site URL.) There should be guidance on the Dashboard that will let you know how to proceed.

If you are still unsure, or you are an anonymous QUIC.cloud user with no Dashboard, then please create a ticket and include your site's Report Number.

Trouble Getting Started

If you are having difficulty getting your first images optimized, try these steps to get the process started:

  • Have you requested a domain key? If not, do so. If you have, try refreshing it and see if that helps.
  • Is your server IP accurate? It should either be empty, or it should be set to your server's correct IP address.
  • If your domain is linked to QUIC.cloud, then visit your QUIC.cloud Dashboard, and check Domain > Settings to be sure the Server IP is set to your server's correct IP address.
  • If you have firewall, please make sure that our IPs are not blocked. They should be whitelisted.
  • If you have a security plugin, please make sure that WP REST API is not disabled.

Out of Quota Warning

Everyone receives a free quota to use with each of the online services. This quota resets at the beginning of every month.

For Image Optimization, there are two request queues. Quota applies to usage of the Fast Queue, while the Standard Queue remains free and unlimited.

If you are seeing a message that you are out of quota for the month, this should not be happening. You should always be able to submit images via the Standard Queue, even if you are out of Fast Queue quota. To solve this problem, try refreshing your Domain Key, like so:

Navigate to LiteSpeed Cache > General > General Settings. Press the button in the Domain Key setting to request/refresh the key. It may take a few minutes. Once it refreshes, please try submitting your images again.

Limit Stuck at 1

Image Optimization always starts with a limit of 1. This is used as a test run to make sure that the Image Optimization servers are able to connect to your server.

If your Image Optimization limit is at 1 and it does not increase after a few requests, check the following to determine a proper remedy:

First, navigate to LiteSpeed Cache > Image Optimization > Image Optimization Summary and check the Image Optimization Status > Failed Image Optimization counter. It is likely increasing. This can be one of several issues:

  • The image is already optimized: This is not a cause for concern. It will keep trying other images, and when an unoptimized one is found, the limit will increase.
  • The Image Optimization server is unable to find your image: Please check your rewrite rules and links.
  • The Image Optimization server is unable to connect to your server: To fix this, add the QUIC.cloud IP list to your whitelist.

If you have a QUIC.cloud account, please check our QUIC.cloud documentation for further information on how to check your Image Optimization status.

No Valid Image Found

Error Message:

No valid image found in the current request.

To clear this error, navigate to LSCache > Image Optimization and click the Rescan New Thumbnails link.

Too Many Requested Images

Error Message:

You have too many requested images, please try again in a few minutes.

This error occurs when the current count of images sent for optimization exceeds 200 (or 1000 for jumbo groups). This is simply a safety mechanism, to ensure a site doesn't send thousands of images for optimization without confirmation that optimization is actually ongoing.

Wait a few minutes for the service to finish some of the requested images before sending a new batch.

Too Many Notified Images

Error Message:

You have too many notified images, please pull down notified images first.

If you have more than 1000 images (or 5000 for a jumbo group) listed as "notified" (meaning, they are ready to pull down), new requests are blocked. You should pull the optimized images prior to sending new ones.

You can manually pull images down, or, you can have them automatically pulled by WP-Cron. For the latter, set LSCache > Image Optimization > Image Optimization Settings > Auto Pull Cron to ON.

If the cron is failing to pull your images, you can try this command with WP-CLI to see what happens:

wp-cli cron event run --due-now

Failed to Retrieve Image

Error Message:

Failed to retrieve image for optimization

This error, which you may see on your QUIC.cloud Dashboard if you have a QUIC.cloud account, indicates that the image to be optimized no longer exists at the original URL that was submitted. You may see this if you have moved image files.

Failed to Retrieve Original Image

Error Message:

Failed to retrieve original image

This error, which you may see on your QUIC.cloud Dashboard if you have a QUIC.cloud account, indicates that there was an md5 mismatch between the original image on your site, and the copy that was retreived. This can happen if you've used plugins that modify images in some way, such as resizing thumbnails.

Failed to Notify WP

Error Message:

Failed to notify WP to pick up optimized images

This error, which you may see on your QUIC.cloud Dashboard if you have a QUIC.cloud account, indicates that QUIC.cloud was unable to inform your WordPress installation that images are ready to be pulled. This may happen if QUIC.cloud IPs are not whitelisted at the firewall, or if there is some other kind of error communicating with your site.

WebP Images

WebP Images Not Generated

If the WebP images can't be found in your file system, it is usually due to one of two reasons:

  • WebP was enabled too late: Create WebP Versions should be turned ON before you begin Image Optimization. If you enable WebP after you have already begun Image Optimization, WebP files will not be generated for any images that have already been processed. If you wish to create WebP files for images that were already optimized, then you will need to Destroy All Optimization Data and start over.
  • The WebP file is bigger than the JPEG: When Image Optimization creates a WebP file, if it is larger in size than the JPEG, the WebP file is discarded, since there is no benefit to serving a larger WebP file over a smaller JPEG.

Once all of the site's image optimization is complete, if you have a question about the WebP for a particular image, you can restore that image from backup in the Media Library, and run image optimization again to see if the WebP is generated this time.

Tip

The WebP indicator next to a Media Library image indicates that WebP images were generated for at least one of the image sizes in that group. It is possible, however, that some image sizes do not have corresponding WebP versions. When this happens it is usually because the WebP image was not smaller than the JPG or the PNG.

WebP Not Loading

If you've generated WebP images through Image Optimization, but they are not showing on the front end, there may be a few reasons:

  1. Not all browsers support WebP. Make sure you are using one that does.
  2. You may not have turned on WebP Replacement. Navigate to Litespeed Cache > Image Optimization > Image Optimization Settings and make sure that the Image WebP Replacement option is set to ON.
  3. The plugin can only perform WebP replacement on the HTML <img> tag. If the image is loaded via CSS, JS, or some other means, LSCache may not be able to correctly insert the WebP file.
  4. Are you sure the WebP actually exists? You can add .webp to the end of any image file to see if a WebP version exists. For example, if you have an image https://www.domain.com/wp-content/uploads/2020/02/test.jpg, enter https://www.domain.com/wp-content/uploads/2020/02/test.jpg.webp into a browser that supports WebP images. If the WebP image exists, it will display. If it doesn't exist, please see WebP Images Not Generated for further troubleshooting.

If you are still unsure what is going on, the Debug Log might help. Navigate to Toolbox > Debug Settings, set Debug Log to ON and Debug Level to Advanced. Clear the cache, load your page, and check the debug log. (Don't forget to turn the log off again when you are finished troubleshooting.)

If the debug log doesn't offer any explanation, try disabling and re-enabling WebP replacement. Sometimes that can fix this issue.

Some WebP Load, Some do Not

If you have a situation where WebP versions of all of your images definitely exist in the file system, but only some of them are being served, take a look at the way those images are referenced. Does the domain name match the Settings > General > Site Address (URL) setting? If it doesn't match, then the JPEG will not be replaced with WebP.

Example

Your site address is www.domain.com, and the page refers to two images: one at www.domain.com/image1.jpg, and the other at domain.com/image2.jpg. Only the image1 WebP (from the www domain) is being displayed, while image2 (from the naked domain) is still being shown as a JPEG.

Make sure that your images are prefaced with an accurate site address, and WebP files will be displayed, if they exist, and if the browser supports it.

Lazy Load

Excluding Images

If you find some images should not be lazy loaded, you can exclude them in LiteSpeed Cache > Page Optimization > Media Excludes. Add the URL to Lazy Load Image Excludes.

Alternately, if you are a developer, you can add the attribute data-no-lazy="1" to the image in your HTML code.


Last update: April 19, 2021