How to Fix Image Optimization Errors

There are a number of different warning/error messages you may see after you've sent an image optimization request. This is your guide to those messages.

Too many errors when try to fetch image source files from your previous request, please check if you have any other optimization plugin.

Have you already optimized your images with another plugin? This can cause a conflict. Please restore the images to their original sizes and try requesting LiteSpeed optimization again.

Previous optimization requests remaining in queue: xxx

All good things are worth waiting for… The previously-requested images are still waiting to be processed. Please give the process 24 hours to complete.

Previous requests in optimizing process: xxx

Your images are currently being processed. Please give the process 24 hours to complete.

Too many errors when try to notify your server for your previous request, please check your firewall settings.

We've tried to contact you, but are having difficulty. Chances are your firewall is blocking us. Verify that it is set up to allow http/https protocols, both inbound and outbound.

Previous requests that optimized but not pulled: xxx 

Your images are finished being processed, but they have not been pulled back to your site. Please run your wp-cron.php or other WordPress cron job to pull all your finished images from the LiteSpeed Image server.

Too many errors when pull optimized images from image optimization server.

Click the link in the message to reset it.

IAPI Error "hash does not match: ClientCB[\ufeffHMAVDipkPeetCbz1] Server[HMAVDipkPeetCbz1]"
Failed to communicate with LiteSpeed IAPI server: "no auth_key"

\ufeff is a Byte Order Mark (BOM) which causes the problem. Check wp-config.php

file wp-config.php

The following result is returned:

Removing BOM in /wp-config.php will fix this problem. Run this command:

sed -i $'1s/^\uFEFF//' wp-config.php

Check again afterwards:

Now the Update Reduction Status button should work fine.

Image groups notified to pull: X , but never be able to pull the images , cron job start for few minutes and notified image groups number still remains same.

Check debug.log with pull action shows:

IAPI failed to decode post json: "missed data"
Media: Failed to pull optimized img: --- '"missed data"'

Issue is due to data expiration, image optimization server keeps optimized images for 20 days ,and images will be removed if not be pulled in 20 days, but client side is not aware of it so it keeps try to pull images that not longer exists in server.

Destory all optimization data and re-do it.