Erro primeira activity

Pessoal estou tentando criar a primeira activity do curso de android aula(https://cursos.alura.com.br/course/android-sua-primeira-app-mobile/task/47696) Porem esta dando erro ao mapear a activity no AndroidManifest.xml. Podem me ajudar nisso por favor?

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

    <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/Theme.AluraAgenda">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>


    </application>

</manifest>