Index: units/helpers/modules_helper.php
===================================================================
--- units/helpers/modules_helper.php	(revision 13919)
+++ units/helpers/modules_helper.php	(working copy)
@@ -207,9 +207,13 @@
 		    	array_push($skip_modules, 'in-commerce', 'in-auction');
 		    }
 
-			$folder = dir(MODULES_PATH);
+			$ret = Array ();
+		    $folder = dir(MODULES_PATH);
 
-			$ret = Array ();
+		    if ($folder === false) {
+		    	return Array ();
+		    }
+
 			while (($entry = $folder->read()) !== false) {
 				$entry_lowercased = strtolower($entry);
 				if (!is_dir($folder->path . '/' . $entry) || in_array($entry_lowercased, $skip_modules)) {