error code: 522
<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/home/p/portbtrx/portnew/public_html/index.php(8) : eval()'d code&quot;:1. (0)
/home/p/portbtrx/public_html/bitrix/modules/main/lib/session/session.php:141
#0: Bitrix\Main\Session\Session-&gt;start()
	/home/p/portbtrx/public_html/bitrix/modules/main/lib/session/kernelsessionproxy.php:42
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start()
	/home/p/portbtrx/public_html/bitrix/modules/main/include.php:169
#2: require_once(string)
	/home/p/portbtrx/public_html/bitrix/modules/main/include/prolog_before.php:14
#3: require_once(string)
	/home/p/portbtrx/public_html/bitrix/modules/main/include/prolog.php:10
#4: require_once(string)
	/home/p/portbtrx/public_html/bitrix/header.php:1
#5: require(string)
	/home/p/portbtrx/portnew/public_html/index.php:12
----------
</pre>