Catchable fatal error: Argument 2 passed to Twig_Environment::render() must be an array, null given, called in /export/vol2/httpd/htdocs/student_info/alpha_eta_rho/lib/rho_util.php on line 19 and defined in /export/vol2/httpd/htdocs/student_info/alpha_eta_rho/lib/Twig/Environment.php on line 286