PHP error "ContextAwarePluginBase" not found

+ The same issue. Not working for D10 at all.

Once you click on "add view_mode pattern" following issue :

The website encountered an unexpected error. Please try again later.

Error: Class "Drupal\Core\Plugin\ContextAwarePluginBase" not found in include() (line 22 of modules/contrib/view_mode_page/src/Plugin/view_mode_page/AliasType/EntityAliasTypeBase.php).
Composer\Autoload\includeFile() (Line: 428)
Composer\Autoload\ClassLoader->loadClass()
class_exists() (Line: 96)
Drupal\Component\Plugin\Factory\DefaultFactory::getPluginClass() (Line: 17)
Drupal\Core\Plugin\Factory\ContainerFactory->createInstance() (Line: 76)
Drupal\Component\Plugin\PluginManagerBase->createInstance() (Line: 62)
Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->initializePlugin() (Line: 80)
Drupal\Component\Plugin\LazyPluginCollection->get() (Line: 83)
Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->setConfiguration() (Line: 99)
Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->addInstanceId() (Line: 55)
Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->__construct() (Line: 259)
Drupal\view_mode_page\Entity\ViewmodepagePattern->getAliasType() (Line: 239)
Drupal\view_mode_page\Form\PatternEditForm->buildEntity() (Line: 171)
Drupal\Core\Entity\EntityForm->afterBuild()
call_user_func_array() (Line: 1083)
Drupal\Core\Form\FormBuilder->doBuildForm() (Line: 579)
Drupal\Core\Form\FormBuilder->processForm() (Line: 325)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 73)
Drupal\Core\Controller\FormController->getContentResult() (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 583)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 166)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 74)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->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: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704)
Drupal\Core\DrupalKernel->handle() (Line: 19)

following path should work :

-use Drupal\Core\Plugin\ContextAwarePluginBase;
+use Drupal\Core\Plugin\ContextAwarePluginTrait;
+use Drupal\Core\Plugin\PluginBase;

- class EntityAliasTypeBase extends ontextAwarePluginTrait implements AliasTypeInterface, ContainerFactoryPluginInterface {
+class EntityAliasTypeBase extends PluginBase implements AliasTypeInterface, ContainerFactoryPluginInterface {
+
 + use ContextAwarePluginTrait {
+    getContextValue as protected traitGetContextValue;
+  }

Possibly a duplicate of 🐛 Context exception when trying to create url (Drupal 10 is broken!) RTBC

Tnx jcnventura. You are right. It is duplicated. Provided path in your link resolved reported issue.

once again tnx.