bkey
i was having the exact same error. here is the fix:

in root/dir/usr/inc/header.inc.php

change line 56 from:

$dir['root'] = "/home/arydenbck/thagrid.com/cgi-system/php.cgi";

to:
$dir['root'] = "/home/arydenbck/thagrid.com/";

chop off everything after .com/ and it works fine.
pintac
Any other fixes for this because this one doesn't work for me. My line 56 doesn't look like this nor do I have the php.cgi anywhere in that file.
 
 
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