EDIT - I got this to work by deleting my existing Pixel 8 Pro emulator device and creating a new one. I have no idea why it wasn't working, but this fixed it. Thanks to tyg, Morrison Chang, and Sasi Kumar for taking a look!

I have worked on several of the code paths from developer.android.com, but it's been a month or so since I've worked on them and there have been several Android Studio updates. Now I am seeing "Activity class not found" in this and my old projects that used to work (no new code was pulled).

Here are the steps to reproduce:

Clone a fresh copy of "dessert clicker" from git.

git clone https://github.com/google-developer-training/basic-android-kotlin-compose-training-dessert-clicker

cd .\basic-android-kotlin-compose-training-dessert-clicker

git checkout starter

Open the project in Android Studio, wait for it to load, and click build. That works, but if I try to run it, it fails with

Error running 'app' Activity class {com.example.dessertclicker/com.example.dessertclicker.MainActivity} does not exist

From what I can see from searching, this is due to a bad manifest file, but as far as I can tell the manifest file is fine.

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.DessertClicker"
        tools:targetApi="33">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:theme="@style/Theme.DessertClicker">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

There is a MainActivity file in the proper location.

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        enableEdgeToEdge()
        super.onCreate(savedInstanceState)
        setContent {
            DessertClickerTheme {
                // A surface container using the 'background' color from the theme
                Surface(
                    modifier = Modifier
                        .fillMaxSize()
                        .statusBarsPadding(),
                ) {
                    DessertClickerApp(desserts = Datasource.dessertList)
                }
            }
        }
    }
}

I am running Android Studio Panda 1 | 2025.3.1

Can anyone help? Thanks.

tools:targetApi="33"