Every time I get enough for rewards I get the message that says I need to connect to collect my rewards. Connect to what and why has this only started happening recently?
At the bottom of this page there is a link to Contact Us. They will be able to tell you if there is a current known issue and/or help you troubleshoot the problem. I can say that I have had it happen and it worked itself out after a few days. I often do a Force Stop and Clear Cache to iron out any bits and bytes that get confused. It happens! It also helps with syncing between two or three devices. Do NOT Clear Data! Settings/Apps/CandyCrush