Drupal\commerce_paypal\CustomCardFieldsBuilder::build(): Argument #1 ($order) must be of type Drupal\commerce_order\Entity\OrderInterface, null given

Hi @trickfun
I have fixed the issue & added patch, please review.

verified! patch #3 worked for me.

Patch works fine but when i try to save payment i get this new error

TypeError: Drupal\commerce_paypal\Plugin\Commerce\PaymentGateway\Checkout::createPaymentMethod(): Argument #2 ($payment_details) must be of type array, null given, called in /var/www/html/web/modules/contrib/commerce/modules/payment/src/PluginForm/PaymentMethodAddForm.php on line 83 in Drupal\commerce_paypal\Plugin\Commerce\PaymentGateway\Checkout->createPaymentMethod() (line 842 of modules/contrib/commerce_paypal/src/Plugin/Commerce/PaymentGateway/Checkout.php).
Drupal\commerce_payment\PluginForm\PaymentMethodAddForm->submitConfigurationForm(Array, Object) (Line: 104)
Drupal\commerce_paypal\PluginForm\Checkout\PaymentMethodAddForm->submitConfigurationForm(Array, Object) (Line: 169)
Drupal\commerce_payment\Plugin\Commerce\InlineForm\PaymentGatewayForm->submitInlineForm(Array, Object) (Line: 159)
Drupal\commerce\Plugin\Commerce\InlineForm\InlineFormBase::runSubmit(Array, Object)
call_user_func_array(Array, Array) (Line: 141)
Drupal\commerce\Plugin\Commerce\InlineForm\InlineFormBase::doExecuteSubmitHandlers(Array, Object) (Line: 134)
Drupal\commerce\Plugin\Commerce\InlineForm\InlineFormBase::doExecuteSubmitHandlers(Array, Object) (Line: 86)
Drupal\commerce\Plugin\Commerce\InlineForm\InlineFormBase::executeElementSubmitHandlers(Array, Object)
call_user_func_array(Array, Array) (Line: 82)
Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object) (Line: 275)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object, 'commerce_payment_method_add_form') (Line: 118)
Drupal\Core\Form\FormValidator->validateForm('commerce_payment_method_add_form', Array, Object) (Line: 593)
Drupal\Core\Form\FormBuilder->processForm('commerce_payment_method_add_form', Array, Object) (Line: 325)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

@trickfun: Well, PayPal checkout doesn't support card tokenization if that is what you're trying to do... So saving the payment method from the user pages isn't supported.

Fine.
But why if i try to add payment i get paypal options available?

Committed a slightly different patch, but again the payment method tokenization isn't supported.

Automatically closed - issue fixed for 2 weeks with no activity.