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[Error] 
[] operator not supported for strings (0)
/home/bitrix/conferences/ifip/www/bitrix/components/bitrix/conf.agenda.list/component.php:530
#0: include
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:551
#1: CBitrixComponent->__includeComponent()
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:603
#2: CBitrixComponent->includeComponent(string, array, object)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/main.php:1041
#3: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/conferences/ifip/www/bitrix/templates/.default/components/bitrix/conf.agenda/agenda_social_ip/agenda.php:37
#4: include(string)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component_template.php:720
#5: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component_template.php:815
#6: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:685
#7: CBitrixComponent->showComponentTemplate()
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:633
#8: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/conferences/ifip/www/bitrix/components/bitrix/conf.agenda/component.php:86
#9: include(string)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:551
#10: CBitrixComponent->__includeComponent()
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/component.php:603
#11: CBitrixComponent->includeComponent(string, array, boolean)
	/home/bitrix/conferences/ifip/www/bitrix/modules/main/classes/general/main.php:1041
#12: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/conferences/ifip/www/intellectual_property_2016/agenda/index.php:53