Charge 3 won't set up - error 403

[SunsetRunner]

Yesterday, 20 June 2021, my Fitbit app started to fail when synchronization with my Charge 3. I first disabled all Bluetooth devices and paired the Charge again but, this did not help.

I removed my device and now, when I try to add it again, I get a 403 error after tapping the Set up button.

I uninstalled the Fitbit app en reinstalled it from the app store. However, the problem persists.

Using iPhone 7 with latest release of iOS

Moderator edit: subject for clarity 

[LiliyaFitbit]

Welcome to the Fitbit Community, @SunsetRunner.

Thanks for the details shared in your post and for already trying to resolve the issue. I recommend doing the following:

1. Log out from the Fitbit app.
2. Force quit the Fitbit app.
3. Clear your iPhone cache: How to Clear Your Browser's Cache on an iPhone.
4. Reboot your phone.
5. Open the Fitbit app, log back into your account and try to set up the tracker. 

For complete troubleshooting tips, see Why can't I set up my Fitbit device?

Hope this helps. 

[SunsetRunner]

Thank you @LiliyaFitbit. I followed the steps but the problem persists.

--
Kind Regards,

Moderator edit: personal info removed

[LiliyaFitbit · Accepted solution]

Thank you for your reply, @SunsetRunner.

I am sorry to hear the issue persists, thank you for your efforts. I recommend restarting your router, or turning off WiFi on your phone and using your cellular data to set up. 

Hope this gets you back on track. 

[SunsetRunner]

In the end it turns out ou ISP was assigning IP addresses that are on known spam block lists. As a result, when we have one of these IP addresses some services, such as Fitbit, blocks requests. I restarted our router and used this site[https://www.whatismyip.com/] to check that the IP was not block listed. Now all is good.

[LiliyaFitbit]

Thank you for your reply, @SunsetRunner.

I am glad to hear that you were able to resolve this issue and thank you for sharing what you did as it may help other members in the same situation. I appreciate your time and efforts and hope you continue enjoying the Fitbit experience and working on your goals.

In case you have some spare time, I would like to invite you to visit our Discussions board where you will find great tips and encouragement from other members.

Keep on visiting the forums!

[Talo68]

Same problem here, the Versa 3 wouldn’t sync over bluetooth, so I set up the versa 3 to factory settings, and when trying to set it as a new device on the app; it shows the 403 error, both on the iPad and on the iPhone. Now my device wouldn’t work on any device.

[Talo68]

This does not work I have tried on three different WiFi addresses and it wont work on any.

Now I do not have my device available on my IPad and on my iPhone either.

[SunsetRunner]

Initially, I switched to mobile data and it connected the device and synced
just fine. What I then did was restart the router so it assigns a new IP
address. Turns out the one that was assigned was identified as a know spam
origin 😞

HTH

--
Kind Regards,

Moderator edit: personal info removed

[Talo68]

Great, thank you for replying, it worked.

[PaulineTO]

I switched to mobile data and it connected the device and synced
just fine. Thanks.