Boot Camp not recognizing Windows 10 ISO
Try re-downloading because the Microsoft website has a bug where it will sometimes terminate the iso download half way through, leaving you with an unfinished iso file. If the size of the iso you downloaded is less than 3.7 gigabytes, then it means its incomplete. You have to head to https://www.microsoft.com/en-au/software-download/windows10ISO to download a new one.