[RuntimeException] 
Could not start session because headers have already been sent. "/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/ajax/vykup.php":1. (0)
/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/bitrix/modules/main/lib/session/session.php:150
#0: Bitrix\Main\Session\Session->start()
	/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/bitrix/modules/main/lib/session/kernelsessionproxy.php:46
#1: Bitrix\Main\Session\KernelSessionProxy->start()
	/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/bitrix/modules/main/include.php:185
#2: require_once(string)
	/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/bitrix/modules/main/include/prolog_before.php:18
#3: require_once(string)
	/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/ajax/addr-insert.php:1
#4: require(string)
	/home/aaaah2b9ae/xn--80aaaah2b9aelit3c.xn--p1ai/docs/ajax/vykup.php:23
----------