м<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/var/www/html/data/fakultety/kafedry/kafedra-predprinimatelskogo-trudovogo-i-korporativnogo-prava-.php&quot;:1. (0)
/var/www/html/data/bitrix/modules/main/lib/session/session.php:143
#0: Bitrix\Main\Session\Session-&gt;start()
	/var/www/html/data/bitrix/modules/main/lib/session/kernelsessionproxy.php:47
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start()
	/var/www/html/data/bitrix/modules/main/include.php:182
#2: require_once(string)
	/var/www/html/data/bitrix/modules/main/include/prolog_before.php:19
#3: require_once(string)
	/var/www/html/data/bitrix/modules/main/include/prolog.php:10
#4: require_once(string)
	/var/www/html/data/bitrix/header.php:1
#5: require(string)
	/var/www/html/data/fakultety/kafedry/kafedra-predprinimatelskogo-trudovogo-i-korporativnogo-prava-.php:2
----------
</pre>