fix tests

Author: LordSimal

tests/TestCase/ToolbarServiceTest.php

@@ -530,7 +530,9 @@ public function testSaveDataSerializationError()
 
         // Create a panel with unserializable data
         /** @var SimplePanel $panel */
-        $panel = $bar->registry()->load(SimplePanel::class);
+        $panel = $bar->registry()->load('DebugKit.TestApp\Panel\SimplePanel', [
+            'className' => SimplePanel::class,
+        ]);
         // Mock the data() method to return something problematic
         $panel->setData(['closure' => fn() => 'test']);