graphaello initialization error

Hey!
Everytime I try to initialize Graphaello, I keep getting this error: 
<img width="568" alt="Screen Shot 2021-03-27 at 3 28 00 PM" src="https://user-images.githubusercontent.com/29883887/112748840-92dea880-8fcf-11eb-809f-3729c16889aa.png">

- Xcode ver 12.4
- Intel Mac
- MacOS Big Sur 11.0.1