I have a strange problem when trying to load the all abums gallery where I get the following error when I get to about 66 active albums

Warning: Invalid argument supplied for foreach() in /homepages/46/d239862995/htdocs/the-plug.com/v2/components/com_php/files/allalbums.php on line 24

which refers to

foreach ($gallery->albums->album as $album)

in my code. Also sometimes is just seems to time out and i get a blank screen. I've viewed all the active albums to make sure there is no errors.  It just seems I can't more than 65 albums loading.