After upgrading to the taxonomy manager

I got the following warning after I installed the upgrade of taxonomy manager:

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /var/www/virtual/buildernet.co.za/htdocs/sites/all/modules/taxonomy_manager/taxonomy_manager.admin.inc on line 1792