Bug: Sanity Studio not working

[BekahHW]

Describe the bug

It appears that in the upgrade of Sanity Studio (via #334), I broke Sanity Studio. Currently, if you follow the instructions in the Readme, you get this error:

Steps to reproduce

1. Install Sanity Studio:

• npm install -g @sanity/cli

• Start the local Sanity Studio which will be available at http://localhost:3333/:

• cd sanity

• npm install # only needs to be ran once

• sanity start

• See error