No that wouldnt cause this issue (or any issues really)…What network adapter have you selected for the VM…Bridged mode in VirtualBox is known to cause issues like this. I recommend using the default network settings.
Bingo! someone give this man a cigar!
There are 4 options for Network Adapters in Vbox. I left the original as is and I enabled another network adapter option in the VirtualBox application and the CnChi installer now works like a charm. The PC it is installing on is using an Atheros Wireless 1502 WLAN Mini Card, so it wasnt conecting to the Internet because CnChi or Vbox did not recognize it. Funny thing is, the previous version of the installer (32bit from Nov 2013) worked AoK with the same PC and wireless card, and original settings for Network Adapter.
So the mirror list is OK even though it is commented out (/etc/pacman.d/antergos-mirrorlist).