우분투에 라이믹스 설치후 DB 설정문제?

[Mon Sep 03 15:18:40.080175 2018] [:error] [pid 7377] [client ] PHP Exception: Error #0 "Call to undefined method mysqli::connect_error()" in modules/install/install.controller.php on line 47 (via classes/db/DBMysql.class.php on line 76)\n#0 /home/lanessnet/www/classes/db/DB.class.php(1138): DBMySQL->__connect()\n#1 /home/lanessnet/www/classes/db/DBMysql.class.php(52): DB->_connect()\n#2 /home/lanessnet/www/classes/db/DB.class.php(147): DBMySQL->__construct()\n#3 /home/lanessnet/www/modules/install/install.controller.php(47): DB::getInstance()\n#4 /home/lanessnet/www/classes/module/ModuleObject.class.php(575): installController->procDBConfig()\n#5 /home/lanessnet/www/classes/module/ModuleHandler.class.php(787): ModuleObject->proc()\n#6 /home/lanessnet/www/index.php(52): ModuleHandler->procModule(), referer: http://sub.laness.net/index.php?act=dispInstallDBConfig&rewrite=Y

[Mon Sep 03 15:18:40.080609 2018] [:error] [pid 7377] [client ] PHP Fatal error:  Uncaught Error: Call to undefined method mysqli::connect_error() in /home/lanessnet/www/classes/db/DBMysql.class.php:76\nStack trace:\n#0 /home/lanessnet/www/classes/db/DB.class.php(1138): DBMySQL->__connect(Array)\n#1 /home/lanessnet/www/classes/db/DBMysql.class.php(52): DB->_connect()\n#2 /home/lanessnet/www/classes/db/DB.class.php(147): DBMySQL->__construct()\n#3 /home/lanessnet/www/common/legacy.php(143): DB::getInstance()\n#4 /home/lanessnet/www/modules/module/module.model.php(1406): executeQuery('module.getModul...', Object(stdClass))\n#5 /home/lanessnet/www/modules/message/message.view.php(24): moduleModel->getModuleConfig('message', NULL)\n#6 /home/lanessnet/www/classes/context/Context.class.php(1526): messageView->dispMessage('\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...')\n#7 /home/lanessnet/www/common/framework/debug.php(661): Context::displayErrorPage('\\xEC\\x84\\x9C\\xEB\\xB2\\x84 \\xEC\\x98\\xA4\\xEB\\xA5\\x98', '\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...', 500)\n#8 /home/lanessnet/ in /home/lanessnet/www/classes/db/DBMysql.class.php on line 76, referer: http://sub.laness.net/index.php?act=dispInstallDBConfig&rewrite=Y

[Mon Sep 03 15:18:40.080642 2018] [:error] [pid 7377] [client ] PHP Fatal Error: Uncaught Error: Call to undefined method mysqli::connect_error() in /home/lanessnet/www/classes/db/DBMysql.class.php:76\nStack trace:\n#0 /home/lanessnet/www/classes/db/DB.class.php(1138): DBMySQL->__connect(Array)\n#1 /home/lanessnet/www/classes/db/DBMysql.class.php(52): DB->_connect()\n#2 /home/lanessnet/www/classes/db/DB.class.php(147): DBMySQL->__construct()\n#3 /home/lanessnet/www/common/legacy.php(143): DB::getInstance()\n#4 /home/lanessnet/www/modules/module/module.model.php(1406): executeQuery('module.getModul...', Object(stdClass))\n#5 /home/lanessnet/www/modules/message/message.view.php(24): moduleModel->getModuleConfig('message', NULL)\n#6 /home/lanessnet/www/classes/context/Context.class.php(1526): messageView->dispMessage('\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...')\n#7 /home/lanessnet/www/common/framework/debug.php(661): Context::displayErrorPage('\\xEC\\x84\\x9C\\xEB\\xB2\\x84 \\xEC\\x98\\xA4\\xEB\\xA5\\x98', '\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...', 500)\n#8 /home/lanessnet/ in classes/db/DBMysql.class.php on line 76, referer: http://sub.laness.net/index.php?act=dispInstallDBConfig&rewrite=Y

[Mon Sep 03 15:18:40.080907 2018] [:error] [pid 7377] [client ] PHP Fatal error:  Uncaught Error: Call to undefined method mysqli::connect_error() in /home/lanessnet/www/classes/db/DBMysql.class.php:76\nStack trace:\n#0 /home/lanessnet/www/classes/db/DB.class.php(1138): DBMySQL->__connect(Array)\n#1 /home/lanessnet/www/classes/db/DBMysql.class.php(52): DB->_connect()\n#2 /home/lanessnet/www/classes/db/DB.class.php(147): DBMySQL->__construct()\n#3 /home/lanessnet/www/common/legacy.php(143): DB::getInstance()\n#4 /home/lanessnet/www/modules/module/module.model.php(1406): executeQuery('module.getModul...', Object(stdClass))\n#5 /home/lanessnet/www/modules/message/message.view.php(24): moduleModel->getModuleConfig('message', NULL)\n#6 /home/lanessnet/www/classes/context/Context.class.php(1526): messageView->dispMessage('\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...')\n#7 /home/lanessnet/www/common/framework/debug.php(661): Context::displayErrorPage('\\xEC\\x84\\x9C\\xEB\\xB2\\x84 \\xEC\\x98\\xA4\\xEB\\xA5\\x98', '\\xEC\\x98\\xA4\\xEB\\xA5\\x98 \\xEB\\xA9\\x94\\xEC\\x8B\\x9C\\xEC\\xA7...', 500)\n#8 /home/lanessnet/ in /home/lanessnet/www/classes/db/DBMysql.class.php on line 76, referer: http://sub.laness.net/index.php?act=dispInstallDBConfig&rewrite=Y
 

AWS 라이트세일에 ftp문제 검색으로 해결후 설치중 일어난 문제입니다

검색을 해봐도 이해를 못하겠어서 도움을 받으려고 올려봅니다