I was facing this issue too and now get my Fitbit working fine.
here are the steps that I was tried to fix it:
* Clean Charging Contacts and Pins
* Change Power Source
* Use Original Charging Cable
* Connect Charging Cable Properly
* [link|https://mywatchgeek.com/fitbit-luxe-not-charging/#Remove_Protective_Strip|Remove Protective Strip|new_window=true]
* Visit now the [link|https://mywatchgeek.com/fitbit-luxe-not-charging|detailed solutions|new_window=true] which I was tried.
* And a few more steps are what can be causing this issue. You should visit this link to read the more details which I have put above.