[RuntimeException] 
Could not start session because headers have already been sent. "":0. (0)
/var/www/electrotorg/data/www/electrotorg.ru/bitrix/modules/main/lib/session/session.php:144
#0: Bitrix\Main\Session\Session->start()
	/var/www/electrotorg/data/www/electrotorg.ru/bitrix/modules/main/lib/session/kernelsessionproxy.php:47
#1: Bitrix\Main\Session\KernelSessionProxy->start()
	/var/www/electrotorg/data/www/electrotorg.ru/bitrix/modules/main/include.php:168
#2: require_once(string)
	/var/www/electrotorg/data/www/electrotorg.ru/bitrix/modules/main/include/prolog_before.php:19
#3: require(string)
	/var/www/electrotorg/data/www/electrotorg.ru/ssh/includes.php:15
#4: require(string)
	/var/www/electrotorg/data/www/electrotorg.ru/ssh/sitemap/one_time_copy_robots_for_subdomains.php:11
----------