I'm having this problem as well, for the first time after using Avast free for 3-4 yrs.
Basically, the interface says "retrieving information" and then does nothing.
I'm down to 18 days or so. If I'm not allowed to re register until I get to 14days, why the notices til now?
Eduardo in Costa Rica with the Avast support group reviewed my PC online last week, suggested a possible fix, then broke off the help session just as I was using that suggested re registration path he recommended. So that method was lost, since his disconnection closed that browser tab.
This whole process has become annoying, and is leading me to (a) switch, and (b) cease recommending the product as I've done often in the past.
I've also gotten annoyed at new 'features' such as the black listing, white listing etc on my Outlook that appear without warning, and that I don't want but cannot disable, beyond cumbersome workarounds.