applicationUrl cannot be changed

[diegosasw]

Hi, this is a great project but I'm afraid some things don't work.
I modifying launchSettings.json for Kestrel and setting a path in the applicationUrl there is an exception

System.InvalidOperationException: 'A path base can only be configured using IApplicationBuilder.UsePathBase().

I am not using GitHub. I'm attempting to host a blazor webassembly in GitLab Pages (I guess it's similar), but failing so far, and I suspect it must have something to do with the base url and rewrites, etc.
https://stackoverflow.com/q/70213662/2948212