[Error] 
Call to undefined function mysqli_connect() (0)
/var/www/prod/bitrix/modules/main/classes/mysql/database_mysqli.php:31
#0: CDatabase->ConnectInternal
	/var/www/prod/bitrix/modules/main/classes/general/database.php:215
#1: CAllDatabase->DoConnect
	/var/www/prod/bitrix/modules/main/classes/mysql/database.php:89
#2: CDatabaseMysql->Query
	/var/www/prod/bitrix/modules/main/classes/general/user.php:4008
#3: CAllUser::GetGroupPolicy
	/var/www/prod/bitrix/modules/main/classes/general/user.php:82
#4: CAllUser->GetSecurityPolicy
	/var/www/prod/bitrix/modules/main/include.php:199
#5: require_once(string)
	/var/www/prod/bitrix/modules/main/include/prolog_before.php:14
#6: require_once(string)
	/var/www/prod/bitrix/modules/main/include/prolog.php:10
#7: require_once(string)
	/var/www/prod/bitrix/header.php:1
#8: require(string)
	/var/www/prod/index.php:20
#9: include_once(string)
	/var/www/prod/bitrix/modules/main/include/urlrewrite.php:159
#10: include_once(string)
	/var/www/prod/bitrix/urlrewrite.php:53