Create Order Item broken on Beta4

After upgrading to Beta4, I can no longer "create order item" on new order. But, I can still "create order item" on existing order.

The ajax error is below:

TypeError: Argument 1 passed to Drupal\Core\Form\FormState::setError() must be of the type array, null given, called in /var/www/html/core/lib/Drupal/Core/Field/WidgetBase.php on line 441 in Drupal\Core\Form\FormState->setError() (line 1093 of /var/www/html/core/lib/Drupal/Core/Form/FormState.php) #0 /var/www/html/core/lib/Drupal/Core/Field/WidgetBase.php(441): Drupal\Core\Form\FormState->setError(NULL, Object(Drupal\Core\StringTranslation\TranslatableMarkup)) #1 /var/www/html/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php(255): Drupal\Core\Field\WidgetBase->flagErrors(Object(Drupal\Core\Field\FieldItemList), Object(Symfony\Component\Validator\ConstraintViolationList), Array, Object(Drupal\Core\Form\FormState)) #2 /var/www/html/core/lib/Drupal/Core/Entity/ContentEntityForm.php(157): Drupal\Core\Entity\Entity\EntityFormDisplay->flagWidgetsErrorsFromViolations(Object(Drupal\Core\Entity\EntityConstraintViolationList), Array, Object(Drupal\Core\Form\FormState)) #3 /var/www/html/core/lib/Drupal/Core/Entity/ContentEntityForm.php(103): Drupal\Core\Entity\ContentEntityForm->flagViolations(Object(Drupal\Core\Entity\EntityConstraintViolationList), Array, Object(Drupal\Core\Form\FormState)) #4 [internal function]: Drupal\Core\Entity\ContentEntityForm->validateForm(Array, Object(Drupal\Core\Form\FormState)) #5 /var/www/html/core/lib/Drupal/Core/Form/FormValidator.php(83): call_user_func_array(Array, Array) #6 /var/www/html/core/lib/Drupal/Core/Form/FormValidator.php(270): Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object(Drupal\Core\Form\FormState)) #7 /var/www/html/core/lib/Drupal/Core/Form/FormValidator.php(119): Drupal\Core\Form\FormValidator->doValidateForm(Array, Object(Drupal\Core\Form\FormState), 'commerce_order_...') #8 /var/www/html/core/lib/Drupal/Core/Form/FormBuilder.php(571): Drupal\Core\Form\FormValidator->validateForm('commerce_order_...', Array, Object(Drupal\Core\Form\FormState)) #9 /var/www/html/core/lib/Drupal/Core/Form/FormBuilder.php(314): Drupal\Core\Form\FormBuilder->processForm('commerce_order_...', Array, Object(Drupal\Core\Form\FormState)) #10 /var/www/html/core/lib/Drupal/Core/Controller/FormController.php(74): Drupal\Core\Form\FormBuilder->buildForm('commerce_order_...', Object(Drupal\Core\Form\FormState)) #11 [internal function]: Drupal\Core\Controller\FormController->getContentResult(Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\RouteMatch)) #12 /var/www/html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #13 /var/www/html/core/lib/Drupal/Core/Render/Renderer.php(574): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #14 /var/www/html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #15 /var/www/html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #16 [internal function]: Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #17 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(139): call_user_func_array(Object(Closure), Array) #18 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(62): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #19 /var/www/html/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /var/www/html/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /var/www/html/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 /var/www/html/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 /var/www/html/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /var/www/html/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #25 /var/www/html/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #26 /var/www/html/core/lib/Drupal/Core/DrupalKernel.php(652): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #27 /var/www/html/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #28 {main}.