I was able to reproduce the error.
When I convert a project with no authentication type, it works.
When I convert a project with Microsoft Identity Platform, I see the error.
I generated a new project using the Telerik Blazor Template for server side.
In the _Host.cshtml file on line 27 it generates the following:
<a href class="reload">Reload</a>
Should be
<a href="" class="reload">Reload</a>
Have a nice day.
Peter