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Error: Call to a member function get() on null in Drupal\sd_commerce_product\PriceManager->calculateDiscount() (line 250 of modules/sd/commerce/modules/product/src/PriceManager.php).
Drupal\sd_commerce_product\PriceManager->calculateDiscount(Object, Array, Array, Array) (Line: 182) Drupal\sd_commerce_product\PriceManager->calculatePrice(Object, Array, Array) (Line: 1414) Drupal\sd_commerce_product\Plugin\Field\FieldWidget\ProductBuilderWidget->calculatePrice(Object, Array, Object) (Line: 109) Drupal\sd_commerce_product\Plugin\Field\FieldWidget\ProductBuilderWidget->formElement(Object, 0, Array, Array, Object) (Line: 353) Drupal\Core\Field\WidgetBase->formSingleElement(Object, 0, Array, Array, Object) (Line: 220) Drupal\Core\Field\WidgetBase->formMultipleElements(Object, Array, Object) (Line: 111) Drupal\Core\Field\WidgetBase->form(Object, Array, Object) (Line: 181) Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(Object, Array, Object) (Line: 121) Drupal\Core\Entity\ContentEntityForm->form(Array, Object) (Line: 106) Drupal\Core\Entity\EntityForm->buildForm(Array, Object) (Line: 170) Drupal\commerce_cart\Form\AddToCartForm->buildForm(Array, Object) (Line: 401) Drupal\sd_commerce_product\Form\SdAddToCartForm->buildForm(Array, Object) call_user_func_array(Array, Array) (Line: 531) Drupal\Core\Form\FormBuilder->retrieveForm('commerce_order_item_sd_add_to_cart_form_commerce_product_6175', Object) (Line: 278) Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 52) Drupal\sd_commerce_product\SdProductLazyBuilders->addToCartForm('6175', 'product', 1, 'en') call_user_func_array(Array, Array) (Line: 101) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #lazy_builder callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 772) Drupal\Core\Render\Renderer->doCallback('#lazy_builder', Array, Array) (Line: 342) Drupal\Core\Render\Renderer->doRender(Array, 1) (Line: 201) Drupal\Core\Render\Renderer->render(Array, 1) (Line: 157) Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 564) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 158) Drupal\Core\Render\Renderer->renderPlain(Array) (Line: 172) Drupal\Core\Render\Renderer->renderPlaceholder('', Array) (Line: 649) Drupal\Core\Render\Renderer->replacePlaceholders(Array) (Line: 534) Drupal\Core\Render\Renderer->doRender(Array, 1) (Line: 201) Drupal\Core\Render\Renderer->render(Array, 1) (Line: 145) Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 564) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 146) Drupal\Core\Render\Renderer->renderRoot(Array) (Line: 279) Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderPlaceholders(Object) (Line: 128) Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object) (Line: 45) Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object, 'kernel.response', Object) call_user_func(Array, Object, 'kernel.response', Object) (Line: 142) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.response') (Line: 191) Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 179) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80) 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: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23) Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)