LiteSpeed WP Plugin: Fix .webp Image Pull Fail

When you’re seeing errors like “Image pull process failure: Failed to pull image [url] https://” with a reference to a .webp file while using the LiteSpeed Cache plugin for WordPress, it typically suggests an issue with fetching or optimizing the specified image. Here are several steps you can take to troubleshoot and potentially fix this error:

1. Check the Image URL

• Verify Existence: Ensure that the image actually exists at the specified URL. Try accessing the URL directly in your web browser.
• Permissions: Confirm that the file permissions on your server allow the LiteSpeed plugin to access and modify the image.

2. Image File Integrity

• Corruption: The image file might be corrupt. Try re-uploading a fresh version of the .webp image to your server.
• Compatibility: Ensure that the .webp image is not saved in a format that’s causing issues with LiteSpeed’s optimization process.

3. Server Configuration

• PHP Extensions: LiteSpeed Cache plugin’s image optimization features might require specific PHP extensions (e.g., gd, imagick) to be installed and enabled on your server.
• Firewall Rules: Check if your server’s firewall or security modules (like mod_security) are blocking outbound connections or specific types of data that the LiteSpeed plugin needs to process images.

4. LiteSpeed Cache Plugin Settings

• Optimization Settings: Review the image optimization settings in the LiteSpeed Cache plugin. You might need to adjust settings or disable certain optimization features temporarily to see if that resolves the issue.
• Clear Cache: Sometimes, clearing the cache can resolve unexpected issues. Try clearing both the plugin’s cache and your browser’s cache.

5. External Factors

• CDN Issues: If you’re using a Content Delivery Network (CDN), there might be configuration issues or restrictions that prevent the image from being pulled or optimized correctly.
• Hosting Limitations: Some hosting environments have specific limitations or configurations that might interfere with the plugin’s ability to pull and optimize images. Check with your hosting provider if you suspect this might be the case.

6. Debugging and Logs

• Enable Debugging: LiteSpeed Cache plugin offers debugging options that can provide more insight into what might be going wrong. Check the debug log for more detailed error messages.
• Server Logs: Review your server’s error logs for any relevant messages that could indicate why the image pull process is failing.

7. Contact Support

If none of the above steps help, consider reaching out to:

• LiteSpeed Support: They might be able to offer more specific advice based on their knowledge of common issues and configurations.
• Hosting Provider: Sometimes, the issue might be related to your specific hosting environment, and your provider could offer insights or solutions.

Ensure you have backups of your site before making significant changes, especially when tinkering with server configurations or plugin settings.

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LiteSpeed WP Plugin: Fix .webp Image Pull Fail – Last option to fix.

If you have exhausted all of the above fixes: Please follow these steps:

1. 1. Open the file located at ./litespeed-cache/src/img-optm.cls.php.
   2. Navigate to around line 964, where you will find the code snippet:

$response = wp_remote_get(.....

1. 1. Add the following line of code just before the above line:

error_log( $server_info['server'], 3, WP_CONTENT_DIR . '/error.log');

1. After making this modification, trigger the error again by performing the operation that previously resulted in the error.
2. Once the error log is generated again, examine the contents of /wp-content/error.log

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