[RuntimeException] 
Could not start session because headers have already been sent. "/home/users/p/panel367/domains/shop.k3-67.ru/include/popup/request_call_pod_zakaz.php":1. (0)
/home/users/p/panel367/domains/shop.k3-67.ru/bitrix/modules/main/lib/session/session.php:117
#0: Bitrix\Main\Session\Session->start()
	/home/users/p/panel367/domains/shop.k3-67.ru/bitrix/modules/main/lib/session/kernelsessionproxy.php:42
#1: Bitrix\Main\Session\KernelSessionProxy->start()
	/home/users/p/panel367/domains/shop.k3-67.ru/bitrix/modules/main/include.php:180
#2: require_once(string)
	/home/users/p/panel367/domains/shop.k3-67.ru/bitrix/modules/main/include/prolog_before.php:14
#3: require_once(string)
	/home/users/p/panel367/domains/shop.k3-67.ru/include/popup/request_call_pod_zakaz.php:4