Cannot resolve symbol 'MyApplication'

To resolve the "Cannot resolve symbol 'MyApplication'" error, you can try the following steps:

1. Make sure that the `MyApplication` class exists in your codebase and is in the correct package. Double-check the package statement at the top of the file.

2. Verify that the `MyApplication` class extends the `android.app.Application` class. The declaration should look like this:

   public class MyApplication extends Application {
       // ...
   }

3. Ensure that the `MyApplication` class is properly registered in your AndroidManifest.xml file. Add the `android:name` attribute to the `<application>` tag and specify the fully-qualified name of your `MyApplication` class, like this:

   <application
       android:name="com.example.MyApplication">
       ...
   </application>

4. If you have recently added or renamed the `MyApplication` class, try cleaning and rebuilding your project. In Android Studio, you can go to "Build" > "Clean Project" and then "Build" > "Rebuild Project".

By following these steps, you should be able to resolve the "Cannot resolve symbol 'MyApplication'" error.