Unexpected error when uninstalling drupal 8 commerce

Question

I am trying to uninstall the commerce modules.

I had purchased a template with the commerce modules and using the files with demo data from them. I have contacted the template provider and he has clarified the issue is not with the template and it is with the module.

I am uninstalling the modules one by one and I also flushed all cache in between each uninstall.

I have also deleted all views, blocks and data under commerce such as orders, products before uninstalling the modules.

I can uninstall all commerce modules except Commerce, Commerce Price, Commerce Store and Commerce Product.

Whenever I try uninstalling Commerce Product, it does not complete for some reason. I only get

The website encountered an unexpected error. Please try again later.</br></br><em class="placeholder">Drupal\Component\Plugin\Exception\PluginNotFoundException</em>: The "commerce_product" entity type does not exist. in <em class="placeholder">Drupal\Core\Entity\EntityTypeManager->getDefinition()</em> (line <em class="placeholder">133</em> of <em class="placeholder">core/lib/Drupal/Core/Entity/EntityTypeManager.php</em>). <pre class="backtrace">flag_views_data_alter(Array, NULL, NULL) (Line: 501)
Drupal\Core\Extension\ModuleHandler->alter('views_data', Array) (Line: 254)
Drupal\views\ViewsData->getData() (Line: 162)
Drupal\views\ViewsData->get('block_content') (Line: 91)
Drupal\views\Plugin\Derivative\ViewsEntityRow->getDerivativeDefinitions(Array) (Line: 101)
Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator->getDerivatives(Array) (Line: 87)
Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator->getDefinitions() (Line: 283)
Drupal\Core\Plugin\DefaultPluginManager->findDefinitions() (Line: 174)
Drupal\Core\Plugin\DefaultPluginManager->getDefinitions() (Line: 22)
Drupal\Core\Plugin\DefaultPluginManager->getDefinition('entity:node') (Line: 16)
Drupal\Core\Plugin\Factory\ContainerFactory->createInstance('entity:node', Array) (Line: 84)
Drupal\Component\Plugin\PluginManagerBase->createInstance('entity:node') (Line: 818)
Drupal\views\Plugin\views\display\DisplayPluginBase->getPlugin('row') (Line: 122)
Drupal\views\Plugin\views\style\StylePluginBase->init(Object, Object, Array) (Line: 821)
Drupal\views\Plugin\views\display\DisplayPluginBase->getPlugin('style') (Line: 883)
Drupal\views\ViewExecutable->initStyle() (Line: 1840)
Drupal\views\ViewExecutable->getTitle() (Line: 132)
Drupal\views\Plugin\views\display\PathPluginBase->getRoute('blog', 'page') (Line: 220)
Drupal\views\Plugin\views\display\PathPluginBase->collectRoutes(Object) (Line: 120)
Drupal\views\EventSubscriber\RouteSubscriber->routes()
call_user_func(Array) (Line: 146)
Drupal\Core\Routing\RouteBuilder->rebuild() (Line: 83)
Drupal\Core\ProxyClass\Routing\RouteBuilder->rebuild() (Line: 477)
Drupal\Core\Extension\ModuleInstaller->uninstall(Array, 1) (Line: 91)
Drupal\Core\ProxyClass\Extension\ModuleInstaller->uninstall(Array) (Line: 160)
Drupal\system\Form\ModulesUninstallConfirmForm->submitForm(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 585)
Drupal\Core\Form\FormBuilder->processForm('system_modules_uninstall_confirm_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm('system_modules_uninstall_confirm_form', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 576)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 153)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 657)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
</pre>

and I can no longer access the website.

Can some one explain the cause of the error to me?

Answer 1

It seems like the theme is dependent on the commerce module, so you have to check theme, there might be some views that rendered directly in the theme and now you have deleted the module so that view does not getting the product entity. you have to enable it.