I am getting the same errory
the DNS has been setup correctly in my provider (claranet) , its been longer then 72 hours and I also added a txt record and i still get this same message
is there an email I need to approve?
I have disconnected the domain twice and still doesn't connect after the 72 hour wait
also squarespace support is average, all bots and no one to actually call and go through it all wish