Fixing login redirect.

src/ChamiloLMS/Component/Auth/LoginSuccessHandler.php

@@ -90,9 +90,9 @@ class LoginSuccessHandler implements AuthenticationSuccessHandlerInterface
 
             if ($count_of_sessions == 1 && $count_of_courses_no_sessions == 0) {
                 $key = array_keys($personal_course_list);
-                $course_info = $personal_course_list[$key[0]]['course_info'];
-                $id_session = isset($course_info['session_id']) ? $course_info['session_id'] : 0;
-
+                $data = $personal_course_list[$key[0]];
+                $course_info = $data['course_info'];
+                $id_session = isset($data['session_id']) ? $data['session_id'] : 0;
                 $url = api_get_path(WEB_COURSE_PATH).$course_info['directory'].'/index.php?id_session='.$id_session;
             }