fix

app/Http/Resources/API/NamingRuleSimpleResource.php

@@ -15,8 +15,8 @@ class NamingRuleSimpleResource extends JsonResource
     public function toArray(Request $request): array
     {
         return [
-            'id' => $this->id,
-            'name' => $this->name,
+            'id' => $this?->id,
+            'name' => $this?->name,
         ];
     }
 }