fix

app/Http/Controllers/TransferItemController.php

@@ -15,6 +15,8 @@ class TransferItemController extends Controller
 {
     public function getSuspendedTransfer()
     {
+        Transfer::where( "transferable_type" , "App\\Item" )->delete();
+        dd("ok");
         $data = Transfer::where( "transferable_type" , "App\\Item" )
             ->where( "status" , StatusTypeEnum::SUSPENDED )
             ->with( [ "user" , "transferable"  , "transferable.user" ] );

app/Http/Resources/TransferResource.php

@@ -35,6 +35,8 @@ class TransferResource extends JsonResource
                 return PackageResource::make($this->transferable);
             }elseif($this->transferable_type == "App\\Item"){
                 return ItemResource::make($this->transferable);
+            }else{
+                return null;
             }
         }
     }