Hi Patrick,
I use Mendix on a Parallels VM also, and I sometimes run into scenarios like the one you’re mentioning. I also use the Parallels Folder Sharing option, so that I can open Mendix project from either the Mac side (\\Mac\home\...) or from some letter drive in windows (Y:\macShare\...) → Which letter depends on how you’ve setup the folder sharing in Parallels
For me, I need to make sure that I have the project open from the letter drive when I’m working with Javascript. This ensures that the path that the modeler looks at when it tries to webpack JS content is absolute.
In other words, ensure that you open the Mendix project file (the .mpr) from the Windows file location, and try your build again.
I hope this helps!
Conner