Bootcamp error: Can’t install the software because it is not currently available from the Software Update server
So I have been getting same error when trying to install windows with bootcamp but I managed to bypass it. Usually I would choose win iso image, choose size for windows partition and click next. Software would begin to download but soon after the error would show up. Usually i would click OK and it would cancel installation, but this time i did not click anything and left it for some time and I noticed that download bar is changing. I left it to finish and only then click OK message, and then I re-run bootcamp installation and that worked!