The POST request does not specify which form is being submitted.

[dosni]

I have a FluentUI User Interface below

Why the only thing this works is only when I declare as
@rendermode InteractiveServer

If I removed it or changed it to

@rendermode InteractiveWebAssembly

It will throw an exception :

The POST request does not specify which form is being submitted. To fix this, ensure

elements have a @formname attribute with any unique value, or pass a FormName parameter if using

@Inject AuthServices _authService

Register

<EditForm Model="@user" OnValidSubmit="@HandleRegistration">
    <DataAnnotationsValidator />
    <FluentValidationSummary />
    <FluentStack Orientation="Orientation.Vertical">
        <FluentGrid Spacing="3" >
            <FluentGrid Justify="JustifyContent.Center">
                <FluentGridItem xs="8">
                    <FluentGrid>
                        <FluentGridItem xs="12">
                            <FluentTextField Appearance="FluentInputAppearance.Outline" style="width: 100%;" @bind-Value="user.Username" Placeholder="User Name" />
                        </FluentGridItem>
                        <FluentGridItem xs="12">
                            <FluentTextField Appearance="FluentInputAppearance.Outline" style="width: 100%;" @bind-Value="user.Password" Placeholder="Password" />
                        </FluentGridItem>
                    </FluentGrid>
                </FluentGridItem>
            </FluentGrid>
        </FluentGrid>
        <FluentGrid Spacing="3" Justify="JustifyContent.Center">
            <FluentGridItem xs="8" >
                <FluentButton Type="ButtonType.Submit" Appearance="Appearance.Accent" Style="width:100%">
                    <FluentIcon Slot="start" Icon="Icons.Regular.Size24.Save" Color="Color.Lightweight" />Simpan
                </FluentButton>
            </FluentGridItem>
        </FluentGrid>
    </FluentStack>

</EditForm>

[dosni]

The problem is gone after adding FormName="Name"

[dosni]

Adding FormName for other than @rendermode InteractiveServer, raise other problems. It keep asking that UserName and password is required.

For the now, I am just going to use @rendermode InteractiveServer, until I find the solution for other rendermode.