An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. When deleting user and content

I found a few topics which use the first part of my title, but not the last. This error is occurring when attempting to delete a user and his content. I use Cleantalk on Drupal V 7.89. The last time I update Cleantalk, it ceased to do what it is supposed to do and my site got infested with a lot of spam accounts. On all other users, I am able to delete them just fine. But I have one user that I am not able to delete and when I try, it results in the following error message posted below. Any help in pointing me to where to look is much appreciated.

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: /?q=batch&render=overlay&id=4778&op=do_nojs&op=do StatusText: Internal Server Error ResponseText: Uncaught exception thrown in shutdown function.PDOException: SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.: UPDATE {batch} SET batch=:db_update_placeholder_0 WHERE (bid = :db_condition_placeholder_0) ; Array ( [:db_update_placeholder_0] => a:14:{s:4:"sets";a:2:{i:0;a:13:{s:7:"sandbox";a:0:{}s:7:"results";a:0:{}s:7:"success";b:1;s:5:"start";d:1656896763.105786;s:7:"elapsed";i:0;s:5:"title";s:18:"Cancelling account";s:12:"init_message";s:24:"Initializing.<br/> ";s:16:"progress_message";s:29:"Completed @current of @total.";s:13:"error_message";s:22:"An error has occurred.";s:3:"css";a:0:{}s:5:"total";i:0;s:5:"count";i:0;s:5:"queue";a:2:{s:4:"name";s:19:"drupal_batch:4778:0";s:5:"class";s:10:"BatchQueue";}}i:1;a:13:{s:7:"sandbox";a:0:{}s:7:"results";a:0:{}s:7:"success";b:0;s:5:"start";d:1656896763.106175;s:7:"elapsed";i:0;s:5:"title";s:23:"Cancelling user account";s:12:"init_message";s:24:"Initializing.<br/> ";s:16:"progress_message";s:29:"Completed @current of @total.";s:13:"error_message";s:22:"An error has occurred.";s:3:"css";a:0:{}s:5:"total";i:1;s:5:"count";i:1;s:5:"queue";a:2:{s:4:"name";s:19:"drupal_batch:4778:1";s:5:"class";s:10:"BatchQueue";}}}s:16:"has_form_submits";b:0;s:10:"form_state";a:3:{s:10:"programmed";b:0;s:7:"rebuild";b:0;s:8:"redirect";s:12:"admin/people";}s:11:"progressive";b:1;s:11:"current_set";i:1;s:3:"url";s:5:"batch";s:11:"url_options";a:1:{s:5:"query";a:3:{s:6:"render";s:7:"overlay";s:2:"id";s:4:"4778";s:2:"op";s:7:"do_nojs";}}s:10:"source_url";s:12:"admin/people";s:8:"redirect";N;s:5:"theme";s:5:"seven";s:17:"redirect_callback";s:11:"drupal_goto";s:2:"id";s:4:"4778";s:13:"error_message";s:85:"Please continue to <a href="/?q=batch&id=4778&op=finished">the error page</a>";s:7:"running";b:1;} [:db_condition_placeholder_0] => 4778 ) in _batch_shutdown() (line 495 of /var/www/vhosts/afreecountry.com/httpdocs/includes/batch.inc).