Issue #3281927 by Sutharsan, nsciacca: Error on node revision route due to...

Issue #3281927 by Sutharsan, nsciacca: Error on node revision route due to core type upcasting change

src/Plugin/Block/FieldBlock.php

@@ -458,7 +458,12 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
       elseif ($entity_type === 'node') {
         if ($route_name == 'entity.node.revision') {
           $entity_revision = $this->routeMatch->getParameter('node_revision');
-          $entity = $this->entityTypeManager->getStorage('node')->loadRevision($entity_revision);
+          if (is_numeric($entity_revision)) {
+            $entity = $this->entityTypeManager->getStorage('node')->loadRevision($entity_revision);
+          }
+          else {
+            $entity = $entity_revision;
+          }
         }
         elseif ($route_name == 'entity.node.preview' && $this->routeMatch->getParameter('view_mode_id') === 'full') {
           $entity = $this->routeMatch->getParameter('node_preview');