Fatal error: Uncaught Error: Class "PayPal\Rest\ApiContext" not found in /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/bootstrap.php:73 Stack trace: #0 /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/bootstrap.php(45): getApiContext() #1 /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/invoice/CreateInvoice.php(7): require('/home/ringrqdv/...') #2 /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/invoice/SendInvoice.php(8): require('/home/ringrqdv/...') #3 /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/invoice/RemindInvoice.php(8): require('/home/ringrqdv/...') #4 {main} thrown in /home/ringrqdv/public_html/vendor/paypal/rest-api-sdk-php/sample/bootstrap.php on line 73