Расписание приема специалистов

[RuntimeException] 
Could not start session because headers have already been sent. "/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/raspisanie.php":89. (0)
/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/bitrix/modules/main/lib/session/session.php:151
#0: Bitrix\Main\Session\Session->start()
	/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/bitrix/modules/main/lib/session/kernelsessionproxy.php:47
#1: Bitrix\Main\Session\KernelSessionProxy->start()
	/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/bitrix/modules/main/include.php:180
#2: require_once(string)
	/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/bitrix/modules/main/include/prolog_before.php:19
#3: require(string)
	/home/httpd/vhosts/rostgmu-clinic.ru/httpdocs/raspisanie.php:188
----------