Cannot Complete Challenge

I cannot complete the challenge 'Access Data 360 from Flows' on https://trailhead.salesforce.com/content/learn/modules/data-cloud-in-flows/access-data-cloud-from-flows?journey=data-360&trail_id=data-cloud-explore-setup-to-activation

I have configured the flow as per the Hands-on Challenge instructions and saved the flow. 

but when i click the 'check challenge' button it says 

" Challenge not yet complete in Data 360 In the Bad Review from High Loyalty Guest flow, we can’t find a setting to add an asynchronous path' 

I have doubled checked the flow name / api name matches what is asked and the Asyncronous option is toggled on as you can see in the screenshot.