As you can see with the images above when I go to add a new razor page instead of taking me to the razor page prompt it instead takes me to add new item and doesn't let me add a razor page. Does anyone know why this is caused? I also need to use an empty razor page for this project.
You have to make sure you have the "ASP.NET and web development" workload installed within Visual Studio.
In Visual Studio go to Tools -> Get Tools and Features... and make sure "ASP.NET and web development" is ticked and then click Modify / Install.
I had the exact same problem and managed to fix it by following the above steps.
