Fehlerattribut Fabattached nicht gefunden

<com.google.android.material.floatingactionbutton.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        app:fabSize="normal"
        android:src="@drawable/ic_add_white_24dp"
        app:layout_anchor="@id/bottom_app_bar"/>
Serial Koder