Adding FieldInheritanceHtmlRouteProvider back

src/Entity/FieldInheritance.php

@@ -18,6 +18,9 @@ use Drupal\Core\Config\Entity\ConfigEntityBase;
  *       "edit" = "Drupal\recurring_events\Form\FieldInheritanceForm",
  *       "delete" = "Drupal\recurring_events\Form\FieldInheritanceDeleteForm"
  *     },
+ *     "route_provider" = {
+ *       "html" = "Drupal\recurring_events\FieldInheritanceHtmlRouteProvider",
+ *     },
  *   },
  *   config_prefix = "field_inheritance",
  *   admin_permission = "administer site configuration",

src/FieldInheritanceHtmlRouteProvider.php

+<?php
+
+namespace Drupal\recurring_events;
+
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\Routing\AdminHtmlRouteProvider;
+use Symfony\Component\Routing\Route;
+
+/**
+ * Provides routes for Field inheritance entities.
+ *
+ * @see Drupal\Core\Entity\Routing\AdminHtmlRouteProvider
+ * @see Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider
+ */
+class FieldInheritanceHtmlRouteProvider extends AdminHtmlRouteProvider {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRoutes(EntityTypeInterface $entity_type) {
+    $collection = parent::getRoutes($entity_type);
+
+    // Provide your custom entity routes here.
+
+    return $collection;
+  }
+
+}