added some config that was missed / wrong

modules/opencase_defaults/config/optional/core.base_field_override.oc_case.volunteer_engagement.actors_involved.yml

@@ -17,6 +17,6 @@ default_value_callback: 'Drupal\opencase_entities\Entity\OCCase::defaultVal'
 settings:
   handler_settings:
     target_bundles:
-      client: client
+      volunteer: volunteer
   handler: default
 field_type: entity_reference

opencase.module

@@ -29,7 +29,9 @@ function opencase_block_access(\Drupal\block\Entity\Block $block, $operation, \D
       'view.activities.page_1',
       'entity.oc_activity.canonical',
       'entity.oc_activity.edit_form',
-      'entity.oc_activity.add_form'
+      'entity.oc_activity.add_form',
+      'system.menu.opencase-add-actors',
+      'block.block.opencaseaddactors',
     ];
     return AccessResult::forbiddenIf(!in_array($route_name, $routes_where_it_should_be_shown))->addCacheableDependency($block);
   }