PHP Authorization with OAuth 2.0 and Okta

charles3001

Good day, cloned the App from github onto my Cent/OS 6.10 Linux running PHP 5.6.40. I have created a proper OKTA account, but when I run the app, it returns the following error:

[prsuser@localhost okta-php-core-login-example]$ php -S 192.168.1.238:8080 -t public
PHP 5.6.40 Development Server started at Tue Dec 17 06:32:11 2019
Listening on http://192.168.1.238:8080
Document root is /home/prsuser/okta-php-core-login-example/public
Press Ctrl-C to quit.
[Tue Dec 17 06:32:20 2019] PHP Fatal error: Class ‘Src\Services\OktaApiService’ not found in /home/prsuser/okta-php-core-login-example/public/index.php on line 7
[Tue Dec 17 06:32:20 2019] 192.168.1.180:12462 [500]: / - Class ‘Src\Services\OktaApiService’ not found in /home/prsuser/okta-php-core-login-example/public/index.php on line 7

Why would this be occurring?