Error connecting to the database: No such file or directory

Fatal error: Uncaught Error: Interface 'CodeIgniter\Exceptions\ExceptionInterface' not found in /work/savani.vn/public_html/libraries/CI/Database/Exceptions/DatabaseException.php:43 Stack trace: #0 /work/savani.vn/public_html/libraries/autoload.php(35): require_once() #1 [internal function]: {closure}() #2 /work/savani.vn/public_html/libraries/CI/Database/BaseConnection.php(425): spl_autoload_call() #3 /work/savani.vn/public_html/libraries/CI/Database/BaseConnection.php(645): CodeIgniter\Database\BaseConnection->initialize() #4 /work/savani.vn/public_html/libraries/CI/Database/BaseConnection.php(1903): CodeIgniter\Database\BaseConnection->query() #5 /work/savani.vn/public_html/libraries/fstext.php(35): CodeIgniter\Database\BaseConnection->getObjectList() #6 /work/savani.vn/public_html/index.php(118): FSText::load_languages() #7 {main} thrown in /work/savani.vn/public_html/libraries/CI/Database/Exceptions/DatabaseException.php on line 43