Hide&Seek (Unity 2021.3.11f1)

When you open the game in Unity, please, go to the 

Window->Package Manager, hit a plus icon on the top left and hit "Add from Git url"

this is the 2d navmesh dependency:

https://github.com/h8man/NavMeshPlus

The 2nd dependency is Cinemachine, just type it in the search bar:)