When I try to access both sites from the email links & browsers (both FireFox & Chrome), get blank page with a large black Q. Delete history & cache - no change. But able to access via my generic Android phone. Did just email one of those sites - via my phone. (Noticed both sites are somehow related when I found a contact email.) Have already tried Apple Community but no help there.

Is there anything I could be trying via FireFox. Have the most current update for my older MAC - El Capitan OS 10.11.6 - have tons of memory. Thanks for your help! Tried screen shots - think only the bottom of the Q comes up but you get the idea.