Which delimiter should be used configuring multiple urls for ASPNETCORE

I mean there:

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I have tried space , comma, semicolon - each time getting this exception

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

or

System.InvalidOperationException: 'Unrecognized scheme in 
server address ' http://localhost:60775/'. Only 'http://' is supported.'

What is application URL in launchSettings JSON?

If you look at the launchSettings. json file, then you will see that the FirstCoreWebApplication profile uses the “commandName”: “Project” value, and as well as please focus on the application URL as shown below. In my application the URL is http://localhost:5000 and the port number might be varying in your example.

It's a semicolon, but remove all spaces between items, e.g. after semicolon.