I keep getting this error

I keep getting this error, even though I have gone through all the troubleshooting the bot has recommended: Challenge not yet complete in Wise Moose Playground

We can't find that the ‘Manage Positions’ permission set grants read, create, and edit object permissions for Position. 

 https://trailhead.salesforce.com/content/learn/modules/data_security/data_security_objects

#Trailhead Challenges