It worked; I was able to build HISE! :D
I don't know if this has anything to do with it, but the only thing I did differently this time, was in GitHub, instead of just clicking "download zip", I went to releases and downloaded the .zip there.

I've just now also made a test plugin with some sample & 1 button to test if everything works,
and it works! :]
I'm so chuffed to bits that it's all working now!
I can now finally make free plugins for my community :D

A REALLY BIG thanks for the support!

@d-healey
I'll wipe every single trace of HISE from my computer and try one more time to build it.
But if it doesn't work again, a screen share session would be appreciated.

I'll reply to this when it has either worked or it hasn't.

Tho a big thank you for the support so far, I really appreciate that.