In addition, I found that Qubes R3.2 does not install when using the on-board graphics card built into the GIGABYTE Aorus GA-Z270X-Gaming 7 (rev 1.0) motherboard with an Intel Core i7-7700K Quad-core 4.2 GHz LGA 1151 Processor. It was necessary to bypass the integrated graphics in BIOS and use an older PCI-E video card.
The video card that did work was an old Sapphire Radeon HD 6850.
Thank you.