Error building hololens app: Gesture Recognizer could not be found.

I have tried many different versions of unity (2017.3.0b 5.6.3p2, 2017.2.0b2), also the versions suggested to build this project from the Microsoft tutorial : HoloLens (1st gen) Basics 101 - Complete project with device - Mixed Reality | Microsoft Learn

I’ve used the code from the above link and the more recent github code. I have also tried both scripting backends.

The error comes from the Fitbox.cs file in their Origami folder. If I delete this file the project will build and run however the gesture recognition obviously does not work.

Any help on this would be appreciated!

Fixed by installing various versions of unity and scripting backends then reopening the project in in the initial 2017.3.02b editor with the same settings as I started with.

If I had done anything remarkable to fix this I would have remembered but it seems it is just an inherently dodgy issue that cannot be fixed with something logical.