Can't redirect root domain

Final update here.  The 2 test domains never did forward both the root & www.  The domain I had the preset squarespace records loaded is still working fine.  I went ahead and added the squarespace defaults to the other domains I need to forward and the root & www. started forwarding correctly immediately. There is exactly no logical explanation to this, but, it works.  

Like all of you, I was pulling my hair out with this problem but I solved it!

I had been having all of the error message mentioned on my Windows desktop, and I thought I'd try to do this on my wife's Mac.

I signed in on the Mac, and it worked the first try.

I don't know if I'm lucky or if this will work for everyone else.

THE WAY TO FIX THIS IS TO JUST LOG OUT OF YOUR SQUARESPACE ACCOUNT, THEN IMMEDIATELY LOG BACK IN AND FORWARD THE DOMAIN. A simple log out and log back in