I am unable to complete this challenge because the required Recruiting app objects are missing from my Trailhead Playground.

Module: Data Security 

Unit: Control Access to Objects 

Challenge: Create a Permission Set for Access to Positions 

Issue: 

I am unable to complete this challenge because the required Recruiting app objects are missing from my Trailhead Playground. 

I checked multiple Trailhead Playgrounds, including a newly created playground. In Object Manager, searches for the following objects return 0 results: 

- Position 

- Candidate 

- Review 

- Job Application 

The Recruiting app is also not available. 

I completed the previous units in the Data Security module successfully, but the objects required for this challenge do not exist in any of my playgrounds. Because of this, I cannot create the required permission sets and permission set groups described in the challenge. 

Could you please verify whether the Recruiting app package is missing from new Trailhead Playgrounds or if there is a known issue with this challenge? 

Thank you.