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Drupal\Component\Plugin\Exception\PluginException: Plugin (campus_faculty_sql_block) instance class "Drupal\campus_faculty\Plugin\Block\CampusFacultySqlBlock" does not exist. in Drupal\Component\Plugin\Factory\DefaultFactory::getPluginClass() (line 97 of core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php).
Drupal\Core\Plugin\Factory\ContainerFactory->createInstance() (Line: 76) Drupal\Component\Plugin\PluginManagerBase->createInstance() (Line: 62) Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->initializePlugin() (Line: 57) Drupal\block\BlockPluginCollection->initializePlugin() (Line: 80) Drupal\Component\Plugin\LazyPluginCollection->get() (Line: 45) Drupal\block\BlockPluginCollection->get() (Line: 83) Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->setConfiguration() (Line: 99) Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->addInstanceId() (Line: 55) Drupal\Core\Plugin\DefaultSingleLazyPluginCollection->__construct() (Line: 34) Drupal\block\BlockPluginCollection->__construct() (Line: 156) Drupal\block\Entity\Block->getPluginCollection() (Line: 145) Drupal\block\Entity\Block->getPlugin() (Line: 118) Drupal\block\BlockAccessControlHandler->checkAccess() (Line: 105) Drupal\Core\Entity\EntityAccessControlHandler->access() (Line: 314) Drupal\Core\Entity\EntityBase->access() (Line: 63) Drupal\block\BlockRepository->getVisibleBlocksPerRegion() (Line: 137) Drupal\block\Plugin\DisplayVariant\BlockPageVariant->build() (Line: 274) Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 132) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() call_user_func() (Line: 142) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 163) Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 80) 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: 23) Stack\StackedHttpKernel->handle() (Line: 166) Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->makeSubrequest() (Line: 119) Drupal\Core\EventSubscriber\CustomPageExceptionHtmlSubscriber->makeSubrequestToCustomPath() (Line: 81) Drupal\Core\EventSubscriber\CustomPageExceptionHtmlSubscriber->on404() (Line: 109) Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException() call_user_func() (Line: 142) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 219) Symfony\Component\HttpKernel\HttpKernel->handleThrowable() (Line: 91) Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58) Drupal\Core\StackMiddleware\Session->handle() (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23) Stack\StackedHttpKernel->handle() (Line: 708) Drupal\Core\DrupalKernel->handle() (Line: 19)