Help me lord

Code/ost/JAVA-FX-PROJECT/_javafx_website_task/src/main/java/com/example/App.java

@@ -7,6 +7,7 @@ import javafx.scene.Scene;
 import javafx.stage.Stage;
 
 import java.io.IOException;
+import java.util.Objects;
 
 /**
  * JavaFX App
@@ -21,7 +22,8 @@ public class App extends Application {
         scene = new Scene(loadFXML("shop"));
 
         // Apply the CSS stylesheet
-        scene.getStylesheets().add(getClass().getResource("styles.css").toExternalForm());
+        String cssPath = Objects.requireNonNull(getClass().getResource("styles.css")).toExternalForm();
+        scene.getStylesheets().add(cssPath);
 
         // Set the stage properties
         stage.setScene(scene);
@@ -42,5 +44,4 @@ public class App extends Application {
     public static void main(String[] args) {
         launch();
     }
-
 }