Be sure to have Unity 2019.2.0fl or newer in order to use this app. To the right there is link to download Unity3D.
After that make a clone of the Project 3 repository, then remove the Assets/VRTK directory and reinstall it from Git according to the VRTK 4 instructions located under 'Cloning the repo'. After that start up the appropriate version of Unity from Unity Hub. From there you should have no error when trying to the project.
We also used Andy Johnson project 2 as a beginning template for this project, the repo can be found here, https://github.com/uic-cs428-arvr-master/Project2
L'indécis - Le Sud