Can you perform the following steps to help us isolate exactly which query is throwing this error? We set SQL_BIG_SELECTS on the main query, however it’s possible this is happening elsewhere.
1. Log into your FTP site and edit wp-config.php
2. Set the following values to “true” (add the lines if they don’t exist):
define(‘WP_DEBUG’, true);
define(‘WP_DEBUG_LOG’, true);
3. Return to the plugin and perform the steps to trigger the error.
4. Now go back to FTP and download this file: /wp-content/debug.log
5. Return to wp-config.php and set DEBUG back to false (reverting the changes made in Step 2)
6. Review the debug.log file and look for any entries for pw-bulk-edit.php
Let me know if you have any questions!