Deprecated function: Creation of dynamic property Drupal\commerce_simple_stock\EventSubscriber\OrderEventSubscriber::$entity_type_manager

Problem/Motivation

When i go to checkout page i get this error:

Deprecated function: Creation of dynamic property Drupal\commerce_simple_stock\EventSubscriber\OrderEventSubscriber::$entity_type_manager is deprecated in Drupal\commerce_simple_stock\EventSubscriber\OrderEventSubscriber->__construct() (line 24 of modules/contrib/commerce_simple_stock/src/EventSubscriber/OrderEventSubscriber.php).
Drupal\commerce_simple_stock\EventSubscriber\OrderEventSubscriber->__construct() (Line: 261)
Drupal\Component\DependencyInjection\Container->createService() (Line: 179)
Drupal\Component\DependencyInjection\Container->get() (Line: 105)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 60)
Drupal\commerce\CommerceContentEntityStorage->invokeHook() (Line: 89)
Drupal\commerce_order\OrderStorage->invokeHook() (Line: 564)
Drupal\Core\Entity\EntityStorageBase->doPostSave() (Line: 781)
Drupal\Core\Entity\ContentEntityStorageBase->doPostSave() (Line: 489)
Drupal\Core\Entity\EntityStorageBase->save() (Line: 806)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (Line: 169)
Drupal\commerce_order\OrderStorage->save() (Line: 354)
Drupal\Core\Entity\EntityBase->save() (Line: 37)
Drupal\commerce_checkout\CheckoutOrderManager->getCheckoutFlow() (Line: 48)
Drupal\commerce_checkout\CheckoutOrderManager->getCheckoutStepId() (Line: 135)
Drupal\commerce_checkout\Controller\CheckoutController->formPage()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Steps to reproduce

Setup stock to product
Add product to cart
Got to checkout page