I can’t repro this issue on my local VS 2017, does the Output window for ServiceStackVS show any info about the error?
Another way to update the ServiceStack reference is to use the web .NET Core tool which you can install with:
$ dotnet tool install --global web
This will let you update all ServiceStack *dto.ts TypeScript References with:
$ web ts
Which you can run by clicking on Open Folder in File Explorer from the right-click context menu of your project, then typing cmd in Explorer’s url bar which will open the current folder in the command prompt.
You can also integrate this with Visual Studio you can create an External Tool: