Conflict with other plugin (queryhunter)

Hello,

Thank you for contacting Rank Math support. We’re sorry that you’re experiencing this issue conflict. We appreciate your cooperation and patience as we try to find a solution for you.

To be able to help troubleshoot this, we’ll need to see your debug log to understand what is causing the error on your website. The debug log is a file that records any errors or warnings that occur on your site. It can help us identify and fix the problem faster.

To share your debug log with us, please follow these steps carefully:

• Open your wp-config.php file. You can find it in the root folder of your site, usually in /public_html/ or /www/.
• Before the line that says /* That’s all, stop editing! Happy blogging. */, add this code:

  // Enable WP_DEBUG mode
  define( 'WP_DEBUG', true );
  
  // Enable Debug logging to the /wp-content/debug.log file
  define( 'WP_DEBUG_LOG', true );
  
  // Disable display of errors and warnings
  define( 'WP_DEBUG_DISPLAY', false );
  @ini_set( 'display_errors', 0 );

  This code will enable the debug mode and create a debug.log file in the /wp-content/ folder of your site.

• Go to your website and try to perform the action that caused the error again, i.e. try saving/publishing a post. This will trigger the error and generate the debug.log file.
• Go to the /wp-content/ folder of your site and look for the debug.log file. It should contain some information about the error that occurred.
• Send us a copy of the debug.log file. You can use a service like wetransfer.com or pastebin.com to upload it and share the link with us.
• Could you also share the link to the Query Hunter plugin you’re referring to? Is it this one (https://joedavies.gumroad.com/l/queryhunter)?

We hope these instructions are clear and easy to follow. If you have any difficulty or questions, please let us know. We’re here to help you.

Thank you for using Rank Math!

Hello,

Based on the error log you have shared, this issue is usually caused by some plugin on your website not using the latest version of the Guzzle HTTP library and using a very old version that doesn’t include a fix to handle custom headers.

You can verify the same by performing a plugin conflict on the website and keeping only the Instant Indexing API plugin enabled try to submit a URL: https://rankmath.com/kb/check-plugin-conflicts/

You can then start enabling the plugins one by one to check which one is using the old version of the library mentioned above.

Once you have found the culprit, you can relay the same information to their developers.

Hope that helps.

Thank you.