Sorry, there’s nothing at this address.

Yes, it is very sad when you get this error in Blazor. I had a very simple MainLayout.razor page. I mean, really simple:

<div class="content px-4">
    @Body
</div>

And yet, my Index.razor file was not being displayed.

Easy fix: I hadn’t put a “page” attribute at the top of the Index page:

@page "/"

@inject CoasterService coasterService
...