Fix error when including the assignment tool with no assignment in learning path - closes #5256

main/work/work.php

@@ -237,7 +237,7 @@ if (!empty($group_id)) {
 
 	} else {
 		//we are in the learnpath tool
-		require Display::display_reduced_header();
+		Display::display_reduced_header();
 	}
 }
 
@@ -1223,4 +1223,4 @@ switch ($action) {
 if ($origin != 'learnpath') {
 	//we are not in the learning path tool
 	Display :: display_footer();
-}
+}