Desperate for help

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Hello my name is Mishal
I can not get my fitbit to sync with my fitness pal app. Its synced with the desktop account. I have deleted the app and reinstalled it. I have went in and checked to make sure that my fitbit is shown as connected to the app, which it is.
I want to track my calories on myfitnesspal as the food log on the fitbit app only holds a few foods and i am constantly having to rescan items. It would make life much easier to track my food on myfitnesspal app and have it synced to my fitbit app.
I would be beyond grateful for help with this problem.
Thank you
Mishal