I recently got the app 'wokamon' and I have synced my FitBit to it (in the settings). I press the FitBit button to 'sync data' and it comes up with "No activity since you've started wokamon, click here for instructions".
I have gone to the apps area on the FitBit website, and deleted the access and 're-accessed' is.
But it's still saying it.
P.S. I also, refreshed the FitBit app too.