ServiceStack MVC - is there a problem with .Net Core2.1

I have created a new ServiceStack solution using the ‘dotnet-new mvc projectname’. its made the project OK using the .net Core 2.1. Just for verification, i thought that all service projects in this solution should / could be ServiceStack.whatever.Core?
Let me know if this is correct. Thanks.

No from v5 a .NET Core App should not have any .Core packages, they should only be used for running ASP.NET Core Apps on the .NET Framework, not for .NET Core Apps.