diff --git a/framework/core/src/Api/JsonApi.php b/framework/core/src/Api/JsonApi.php
index dd192dc930..100265bbd6 100644
--- a/framework/core/src/Api/JsonApi.php
+++ b/framework/core/src/Api/JsonApi.php
@@ -25,8 +25,8 @@
 
 class JsonApi extends BaseJsonApi
 {
-    protected string $resourceClass;
-    protected string $endpointName;
+    protected ?string $resourceClass = null;
+    protected ?string $endpointName = null;
     protected ?Request $baseRequest = null;
     protected ?Container $container = null;