Ionic Studio - TypeError: Cannot read property 'major' of null

I am trying to open an Ionic project in Ionic Studio in an NX mono repo.

Unlike in the photo gallery demo project, we are using Angular 9 with Ionic 5.

When I try to open the project up in Ionic Studio using the root directory for the app (not the entire mono repo) I am getting the below error:

My file and directory structure is identical to the Ionic photo gallery demo app and the project runs successfully in my browser when running the command $ Ionic serve.

You can see my directory structure below:

Any suggestions on how to fix this, or approach fixing this would be greatly appreciated.

Thank you.