Warning: require_once(assets/library/db.class.php): Failed to open stream: No such file or directory in D:\web\teleflex\tst\mailclient\login.write.php on line 3

Fatal error: Uncaught Error: Failed opening required 'assets/library/db.class.php' (include_path='C:\xampp\php\PEAR') in D:\web\teleflex\tst\mailclient\login.write.php:3 Stack trace: #0 {main} thrown in D:\web\teleflex\tst\mailclient\login.write.php on line 3