The app crashes when I click the button that uses startActivity.
I want to ask the user if they wish to use the app as their default launcher.

In Java, I have this function in MainActivity.java:

public void promptSetDefaultLauncher(View view) {
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_HOME);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        try {
            startActivity(intent);
        } catch (ActivityNotFoundException e) {
            Log.e("LauncherError", "Home activity not found", e);
            Toast.makeText(this, "Home activity not found", Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            Log.e("LauncherError", "Unexpected error", e);
            Toast.makeText(this, "Unexpected error", Toast.LENGTH_SHORT).show();
        }
    }

It is linked to this button in the activity_main.xml:

<Button
            android:id="@+id/BTN_DefaultLauncher"
            android:layout_width="match_parent"
            android:layout_height="83dp"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="132dp"
            android:text="@string/set_as_default"
            android:onClick="promptSetDefaultLauncher"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent" />

Here’s the AndroidManifest.xml:

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

    <queries android:name="android.permission.QUERY_ALL_PACKAGES"/>

    <queries>
        <intent>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent>
    </queries>
    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Plainhome"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.HOME" />
            </intent-filter>
        </activity>
    </application>

</manifest>

I tried modifying AndroidManifest.xml, modifying its call, calling it in other functions…