[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: Illegal mix of collations for operation 'UNION' (400)

				SELECT NULL AS SITE_ID, NAME, VALUE 
				FROM b_option 
				WHERE MODULE_ID = 'main' 
				UNION
				SELECT SITE_ID, NAME, VALUE 
				FROM b_option_site 
				WHERE MODULE_ID = 'main' 
			
/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/db/mysqlconnection.php:116
#0: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/config/option.php:200
#2: Bitrix\Main\Config\Option::load(string)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/config/option.php:38
#3: Bitrix\Main\Config\Option::get(string, string, string)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/httprequest.php:392
#4: Bitrix\Main\HttpRequest->prepareCookie(array)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/httprequest.php:69
#5: Bitrix\Main\HttpRequest->__construct(object, array, array, array, array)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/httpapplication.php:47
#6: Bitrix\Main\HttpApplication->initializeContext(array)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/lib/application.php:122
#7: Bitrix\Main\Application->initializeExtendedKernel(array)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/include.php:23
#8: require_once(string)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/include/prolog_before.php:14
#9: require_once(string)
	/home/skoronarh/lkschool.ru/docs/bitrix/modules/main/include/prolog.php:10
#10: require_once(string)
	/home/skoronarh/lkschool.ru/docs/bitrix/header.php:1
#11: require(string)
	/home/skoronarh/lkschool.ru/docs/kindergarten/Мероприятия/den-otkrytykh-dverey-v-detskom-sadu-berezka.php:2