I'm having all sorts of problems trying to complete the challenge for the sharing rules section of this module. I feel like I have everything setup properly but still get this error message:
Challenge Not yet complete... here's what's wrong: 
The Sharing Set is not setup with proper Case access. Please check the requirements.

Sharing set name is "Share cases with customers"
Applies to Profiles: Customer Community User
Access Granted: Case - User:Account = Case:Account - Read/Write

What am I missing