I've had the same problem.  Three weeks ago the feed stopped working for my seven Barclays accounts and I had to go through the whole rigmarole of reconnecting.  Despite being rewarded with a big fat green tick on my screen, when I return to the banking page I get the same message again saying I need to reconnect my accounts to comply with EU legislation.     It's incredibly annoying and time-wasting.  Downloading from Barclays into csv files and importing them is so very tedious and unreliable. 

I called Barclays and they investigated their end, very patiently and thoroughly and concluded that the problem is with Intuit. 

None of that helps others to fix the problem I know but you might just feel better knowing that you are not alone...