This was an issue caused by a blank line of code in an include file you had added to the page.
I was able to find the issue by adding this to the top of the page:
<?php ini_set('display_errors',1); ?>
That caused php to display the errors on the page and I saw a "headers already sent" error in the commonrs.php page on line 60, so I went to that page and saw the blank line of code. Once I deleted that everything appears to function properly.