I followed the documentation here as best as I could.

the test page is this

I've updated the startup blazorHub() and MapFallbackToPage() endpoints

If I browser to existing razor Page ClientDashboard.cshtml and have it load the component the blazor page will load and function. So I know my blazor.js is loading correctly

@(await @Html.RenderComponentAsync<Components.ClientDashboard.ClientManagement>(RenderMode.Server, new{clientId = @Model.ClientID}))

But I'm not wanting to bypass this and just actual routing to navigate to my blazor pages localhost.com/ClientDashboard/42 for example.

But I'm currently getting page error when trying to browse to https://localhost:5001/TestRouting page

I'm unsure what I'm missing or how to debug this and guidance would be appreciated!

Update I tried PMC suggestion but got different error page came up blank with this error in browser tools

Update 2

Moved all files into the Pages directory just in case there was an issue with the locations. Also tried a few versions of the host.cshtml

still, get null reference exception either directly on the page or in the console of the browser.

Referenced PMC

CodePudding user response：

Try change

<Router AppAssembly="typeof(App).Assembly">

to this in your App.Razor file

<Router AppAssembly="typeof(Program).Assembly">

I followed this