Get this error when trying to access index.php

Warning: Call-time pass-by-reference has been deprecated - argument passed by value; 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. However, future versions may not support this any longer. in /var/www/vhosts/harper2.com/subdomains/game/httpdocs/bugdar/index.php on line 68

Thank you for your bug report. This issue has been closed and fixed in Subversion. This change will be available in a future release, but you can download the change at any time from the Subversion server.