Fitbit Support on Twitter: "@stergianosc Thanks for the screenshot. Mind sharing us a screenshot so we can see what error you see whne you try to add the card to your account?
The most common Fitbit problems and how to fix them - Android Authority
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Fitbit Official Site for Activity Trackers and More
Solved: How to contact Fitbit Support - Fitbit Community
Fitbit Official Site for Activity Trackers and More
How to contact Fitbit customer support about problems and warranty info - MyHealthyApple
the battery of my Versa is lasting less than 2 day... - Fitbit Community