Codeigniter show warning

I have installed codeigniter4 yesterday. When I pointed my browser to ci4.dev, I am getting some warning message i.e

( ! ) Warning: include_once(C:\wamp64\www\ci4\system\Debug/ImageException.php): failed to open stream: No such file or directory in C:\wamp64\www\ci4\system\Autoloader\Autoloader.php on line 153
Call Stack
# Time Memory Function Location
1 0.0014 363416 {main}( ) ...\index.php:0
2 0.0028 378824 require( 'C:\wamp64\www\ci4\system\bootstrap.php' ) ...\index.php:27
3 0.0157 869240 CodeIgniter\CodeIgniter->initialize( ) ...\bootstrap.php:118
4 0.0157 869256 CodeIgniter\Config\Services::exceptions( ) ...\CodeIgniter.php:158
5 0.0157 869296 CodeIgniter\Config\Services::getSharedInstance( ) ...\Services.php:175
6 0.0157 869696 CodeIgniter\Config\Services::exceptions( ) ...\Services.php:672
7 0.0157 869696 spl_autoload_call ( ) ...\Services.php:183
8 0.0157 869808 CodeIgniter\Autoloader\Autoloader->CodeIgniter\Autoloader\{closure}( ) ...\Services.php:183

( ! ) Warning: include_once(): Failed opening 'C:\wamp64\www\ci4\system\Debug/ImageException.php' for inclusion (include_path='.;C:\php\pear') in C:\wamp64\www\ci4\system\Autoloader\Autoloader.php on line 153
Call Stack
# Time Memory Function Location
1 0.0014 363416 {main}( ) ...\index.php:0
2 0.0028 378824 require( 'C:\wamp64\www\ci4\system\bootstrap.php' ) ...\index.php:27
3 0.0157 869240 CodeIgniter\CodeIgniter->initialize( ) ...\bootstrap.php:118
4 0.0157 869256 CodeIgniter\Config\Services::exceptions( ) ...\CodeIgniter.php:158
5 0.0157 869296 CodeIgniter\Config\Services::getSharedInstance( ) ...\Services.php:175
6 0.0157 869696 CodeIgniter\Config\Services::exceptions( ) ...\Services.php:672
7 0.0157 869696 spl_autoload_call ( ) ...\Services.php:183
8 0.0157 869808 CodeIgniter\Autoloader\Autoloader->CodeIgniter\Autoloader\{closure}( ) ...\Services.php:183

I have no idea with other framework technique. I am beginner and my framework starting base is CI.3. Currently I am using wamp server with php7.