What does this error mean

#1

Fatal error: Uncaught Paynow\Payments\InvalidIntegrationException in C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Core\CanFail.php:34 Stack trace: #0 C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Core\InitResponse.php(60): Paynow\Core\InitResponse->fail(‘invalid id.’) #1 C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Core\InitResponse.php(43): Paynow\Core\InitResponse->load() #2 C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Payments\Paynow.php(176): Paynow\Core\InitResponse->__construct(Array) #3 C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Payments\Paynow.php(103): Paynow\Payments\Paynow->init(Object(Paynow\Payments\FluentBuilder)) #4 C:\xampp\htdocs\index.php(20): Paynow\Payments\Paynow->send(Object(Paynow\Payments\FluentBuilder)) #5 {main} thrown in C:\xampp\htdocs\paynow\vendor\paynow\php-sdk\src\Core\CanFail.php on line 34

what does this error mean

#2

Exception thrown if wrong credentials are used to make a request to Paynow - should be invalid ID used for integration

#3

How can i direct the user topaynow i am sesrching for the url

#4

make use of $response->redirectUrl()