issue with adding roles

Hi all,

I have a question on one of the most simple processes in SF but there appears to be some sort of error. I am trying to add new roles. I go to setup - roles - add role and receive the following dialogue box. I can't add the role or move forward at all. I can't do it on other browsers either. Any thoughts? Thanks!

And for what it may be worth, here is the challenge I am on:

https://trailhead.salesforce.com/content/learn/projects/protect-your-data-in-salesforce/set-defaults-and-create-role-hierarchy

It is for the piece labeled "Create a Role Hierarchy"

Ty!