Warning: include(class/sql/MysqliDb.php): failed to open stream: No such file or directory in C:\wamp64\www\upload.php on line 2

Warning: include(): Failed opening 'class/sql/MysqliDb.php' for inclusion (include_path='.;C:\php\pear') in C:\wamp64\www\upload.php on line 2

Fatal error: Uncaught Error: Class 'MysqliDb' not found in C:\wamp64\www\upload.php:5 Stack trace: #0 {main} thrown in C:\wamp64\www\upload.php on line 5