[Error] 
Call to undefined function slog() (0)
/home/bitrix/www/bitrix/modules/acrit.unisender/custom_mail.php:26
#0: custom_mail(string, string, string, string, string, object)
	/home/bitrix/www/bitrix/modules/main/tools.php:6894
#1: bxmail(string, string, string, string, string, object)
	/home/bitrix/www/bitrix/modules/main/lib/mail/mail.php:179
#2: Bitrix\Main\Mail\Mail::send(array)
	/home/bitrix/www/bitrix/modules/main/lib/mail/event.php:247
#3: Bitrix\Main\Mail\Event::handleEvent(array)
	/home/bitrix/www/bitrix/modules/main/lib/mail/eventmanager.php:168
#4: Bitrix\Main\Mail\EventManager::executeEvents()
	/home/bitrix/www/bitrix/modules/main/lib/mail/eventmanager.php:36
#5: Bitrix\Main\Mail\EventManager::checkEvents()
	/home/bitrix/www/bitrix/modules/main/classes/general/event.php:21
#6: CAllEvent::CheckEvents()
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3520
#7: CAllMain::EpilogActions()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:50
#8: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#9: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#10: require(string)
	/home/bitrix/www/catalog/index.php:604
#11: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#12: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2