"No Network Connection" error message

[RRBG]

Fitbit folks.  I simply did a reboot on my Galaxy S6 and the network connection problem went away.  Simple fix and worth a try!

Moderator edit: edited title for clarity

[yuSabriel]

I am having an error logging in to the fitbit app on my phone. I uninstalled and reinstalled the app due to a syncing error when I added my new device to the app. Now I cannot log in at all so my device will not work.

I previously had a charge hr and did not experience this problem.

[gollux]

When attempting to log in to the fitbit Android app for the first time, I get an error message -"No network connection" - even though other apps on my device are able to access the internet.

I have seen that a number of other people have had this issue, but I haven't found a solution that works for me. (My device time seems to be correct, and changing it doesn't help.) Any other ideas?

[emurii]

I am having this issue right now, too. Device time and permissions are both fine.

[Mrthebatman]

Same here. Exercises disappeared and food logged, but not showing up on app. Desktop website works fine though. 

[SYTH]

 I am new to Fit bit, while making my account I had many "errors" and had to restart. Now that I have made my account I am unable to sign in on my Android and receive a "No Network connection" error. 

So I attempt to set up from my computer and it's telling me I need a Dongle and my Charge 2 did not come with such a device. Do I really need to purchase one to continue?