[intec\core\db\Exception] 
SQLSTATE[HY000]: General error: 2006 MySQL server has gone away
The SQL being executed was: SELECT
    kcu.constraint_name,
    kcu.column_name,
    kcu.referenced_table_name,
    kcu.referenced_column_name
FROM information_schema.referential_constraints AS rc
JOIN information_schema.key_column_usage AS kcu ON
    (
        kcu.constraint_catalog = rc.constraint_catalog OR
        (kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
    ) AND
    kcu.constraint_schema = rc.constraint_schema AND
    kcu.constraint_name = rc.constraint_name
WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
AND rc.table_name = 'constructor_builds' AND kcu.table_name = 'constructor_builds' (0)
/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/Schema.php:560
#0: intec\core\db\Schema->convertException(object, string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/Command.php:735
#1: intec\core\db\Command->queryInternal(string, NULL)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/Command.php:280
#2: intec\core\db\Command->queryAll()
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/mysql/Schema.php:264
#3: intec\core\db\mysql\Schema->findConstraints(object)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/mysql/Schema.php:93
#4: intec\core\db\mysql\Schema->loadTableSchema(string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/Schema.php:134
#5: intec\core\db\Schema->getTableSchema(string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/ActiveRecord.php:168
#6: intec\core\db\ActiveRecord::getTableSchema()
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/ActiveRecord.php:210
#7: intec\core\db\ActiveRecord::populateRecord(object, array)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/ActiveQueryTrait.php:99
#8: intec\core\db\ActiveQuery->createModels(array)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/ActiveQuery.php:174
#9: intec\core\db\ActiveQuery->populate(array)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.core/classes/db/ActiveQuery.php:260
#10: intec\core\db\ActiveQuery->one()
	/home/bitrix/ext_www/multicom.by/bitrix/modules/intec.constructor/classes/models/Build.php:182
#11: intec\constructor\models\Build::getCurrent()
	/home/bitrix/ext_www/multicom.by/bitrix/templates/universe_s1/header.php:32
#12: include_once(string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/main/include/prolog_after.php:106
#13: require(string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/main/include/prolog.php:11
#14: require_once(string)
	/home/bitrix/ext_www/multicom.by/bitrix/header.php:1
#15: require(string)
	/home/bitrix/ext_www/multicom.by/catalog/index.php:1
#16: include_once(string)
	/home/bitrix/ext_www/multicom.by/bitrix/modules/main/include/urlrewrite.php:159
#17: include_once(string)
	/home/bitrix/ext_www/multicom.by/bitrix/urlrewrite.php:2