致命错误：未捕获错误：在C：\ Users \ Thibault \ Downloads everbounce-client-master ever.php中找不到类'NeverBounce \ API \ NB_Auth'：15

I try to use NeverBounce API-PHP. But when i want to launch my Php file i had this error :

Fatal error: Uncaught Error: Class 'NeverBounce\API\NB_Auth' not found in C:\Users\Thibault\Downloads everbounce-client-master ever.php:15 Stack trace: #0 {main} thrown in C:\Users\Thibault\Downloads everbounce-client-master ever.php on line 15

Line 15 : NB_Auth::auth($apisecret, $apikey);

The file that contains all the API classes is in the file, where is my class never.php.

Try the following items:

1. Check if the file with your class was included (equire() or include()), especially if there is no autoloader in your project?
2. Check if there are no problems with namespaces in you class?
3. If you use composer autoloader – try to run composer dump-autoload to update your autoloader