Blazor: The name 'Acti' does not exist in the current context

I'm getting the following Error:

The name 'Acti' does not exist in the current context

In the code behind file acti is declared as a string:

[Parameter]public string? Acti { get; set; }

ClientEditForm.Razor:

@namespace Views.Components.Clients@page "/client/{clientNo:int}/{Acti}"<ClientEditFormComponent Acti="@Acti" />