I’ve stripped almost everything, except the pertinent info. BaseViewModel inherits from ObservableObject. I started with a traditional WPF MVVM approach but could no longer make ICommands work. Although it does seem to work fine in a Maui Blazor Hybrid app but this is just a Maui app. From what I found RelayCommand is the correct approach with the latest Maui but my Button Command won’t work, no matter what I’ve tried. Any suggestions?

public partial class SignInViewModel : BaseViewModel
{
public RelayCommand UserLoginCommand { get; set; }

    public SignInViewModel()
    {
        UserLoginCommand = new RelayCommand(UserLogin);
    }

    async void UserLogin()
    {
       ...
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:NMMaui"
             x:Class="NMMaui.Views.SignInPage"
             xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
             xmlns:vm="clr-namespace:NMMaui.ViewModels"
             Title="Sign In"
             HeightRequest="600"
             Background="Silver">
    <ContentPage.BindingContext>
        <vm:SignInViewModel/>
    </ContentPage.BindingContext>
    <VerticalStackLayout>
        <Grid RowDefinitions="Auto,*">
               <Button 
                 Grid.Row="10" 
                 Text="Sign In" 
                 FontAttributes="Bold" 
                 TextColor="White" 
                 Margin="0,20" 
                 HeightRequest="50" 
                 CornerRadius="10"
                 HorizontalOptions="Center"
                 Command="{Binding UserLoginCommand}"
                 BackgroundColor="#508390"></Button>
        </Grid>
    </VerticalStackLayout>
</ContentPage>