Возникла необычная ошибка
/calendar/set.php?return=L2NhbGVuZGFyL3ZpZXcucGhwP3RpbWU9MTU1MzM0ODc2MiZjb3Vyc2U9MQ%3D%3D&sesskey=HQXbHKzTOG&var=showcourses