Thank you. Yes I have read it, but a refresher never hurts. For now I just want to build the latest version though, that’s all.
In your linked thread, I found this post by @Deltakosh: NPM Run Build Gives Errors - #5 by Deltakosh. So I deleted the node_modules folder in the root (I did try to do an npm run build in the root first before consulting the docs because it didn’t work) and now I’m trying to build again from the Tools/Gulp directory. Editing in the results when it’s finished.