Android resource linking failed

Android Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="br.com.alura.agenda">

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

MainActivity.java

package com.example.agenda;
import android.app.Activity;

public class MainActivity extends Activity {}

Erro na aba 'Build Output'

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugResources'.
> A failure occurred while executing com.android.build.gradle.internal.res.LinkApplicationAndroidResourcesTask$TaskAction
   > Android resource linking failed
     C:\Users\Usuario\AndroidStudioProjects\Agenda\app\build\intermediates\packaged_manifests\debug\AndroidManifest.xml:12: error: resource style/AppTheme (aka com.example.agenda:style/AppTheme) not found.
     error: failed processing manifest.

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