[RuntimeException] Could not start session because headers have already been sent. "/home/c/cy32820/sialdev/public_html/price_list_create/template_data.php":1. (0) /home/c/cy32820/sialdev/public_html/bitrix/modules/main/lib/session/session.php:117 #0: Bitrix\Main\Session\Session->start() /home/c/cy32820/sialdev/public_html/bitrix/modules/main/lib/session/kernelsessionproxy.php:42 #1: Bitrix\Main\Session\KernelSessionProxy->start() /home/c/cy32820/sialdev/public_html/bitrix/modules/main/include.php:180 #2: require_once(string) /home/c/cy32820/sialdev/public_html/bitrix/modules/main/include/prolog_before.php:14 #3: require(string) /home/c/cy32820/sialdev/public_html/price_list_create/template_data.php:8