Just got off the phone with support. They suggested it could be a cache & cookies issue. Opened up in an incognito window in Chrome (Ctrl/Cmd + Shift + N), logged in, did the Fix Now, and was prompted for a 6 digit verification code. Entered. It asked again. Then it gave me a nice green check mark. Went back to my normal window and refreshed. Still showed a damaged connection. Clicked to fix. Took me to the phone verification code. Entered once. And all is good. So, you can try deleting cache/cookies for QBO, or just do the process in an incognito window then in a normal window.
