Blazor form submit button doesn't call my submit method

I wrote a login form in Blazor (with some MudBlazor elements) and now I've run the app but after filling in the form and pressing the Submit button nothing happens. What am I doing wrong?

<EditForm Style="width: 700px;" Model="@_loginModel" OnValidSubmit="OnValidLoginSubmit" FormName="LoginForm"><DataAnnotationsValidator /><MudGrid Style="width: 100%;"><MudItem Style="width: 100%;"><MudPaper Width="100%"><MudCardContent><MudTextField Label="Username or email" HelperText="Type either your username or email" @bind-Value="_loginModel.UsernameOrEmail" For="@(() => _loginModel.UsernameOrEmail)" ErrorText="@_loginUsernameErrorText" OnBlur="OnBlurCallback" /><MudTextField Label="Password" HelperText="Type your password" Class="mt-3" @bind-Value="_loginModel.Password" For="@(() => _loginModel.Password)" InputType="InputType.Password" /></MudCardContent>                @if (_backendLoginResponse is not null)                {<MudAlert Severity="Severity.Error">@_backendLoginResponse</MudAlert>                }<MudCardActions><MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary" Class="ml-auto">Login</MudButton></MudCardActions></MudPaper></MudItem></MudGrid></EditForm>