Use your MyFitnessPal username and password instead of Facebook to login for the connection. If you are still having trouble, use the 'Reconnect to MyFitnessPal' to revoke access and then connect again. Last option would to make sure you are logged out of myfitnesspal.com on your device's default internet browser (Safari - iOS or Chrome - Android), then restart Sworkit and try again.
I can't sync to MyFitnessPal, anything I can try?
Try Sworkit Premium
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