03-21-2016 00:48
03-21-2016 00:48
04-01-2016 10:51
04-01-2016 10:51
Hello my friend @Maggiecme, welcome to the Community! Hmmmm... are you the owner of this challenge? If not, would you mind to ask to the owner to resend the invitation? Are you getting any error when trying to accept it?
Always make sure that your Fitbit app is running the latest version.
Hope this helps!
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