Moved code from PC to Mac - Won't compile

I began developing on my Windows 10 PC and my app is working well on the PC and I can even sideload it onto my Android device.

I installed ionic on my macbook air (latest version) and moved the code over but it fails to compile - at least, using ionic lab. No real error messages… just the fail to compile.

Is there something I need to do to make the same code work on a macbook?