Can't set up my new Versa 4

[Ash112]

I bought a second hand versa 4 watch. When I reset and try to connect with new device, I am having problem with pairing issue. When app say connect your watch with charger and a 4 digit code pop up in watch and after typing that code in phone. I am having problem at that step. They say something went wrong ( try again or exit). I tried several times but same problem. Please anyone help me to solve this problem 

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Ash112. Welcome to the Fitbit Community Forums. Thanks for bringing this to my attention, for the troubleshooting steps you've tried, and for the image attached. I'm sorry to hear that your new Versa 4 is not connecting to your account. I understand your concern, I will do my best to help you with this!

As a first approach, I'd like to clarify if this is the first Versa 4 or Fitbit device you own? I understood that it's a second hand device, but what I want to know is if it's the first device you try setting on your Fitbit account? If so, since your Versa 4 was owned by someone else prior to you, I'd recommend performing a factory reset. To do so, On your Fitbit device, open the Settings app > About > Factory Reset. Then, try setting it up once again by following these steps. 

On the other hand, if you're replacing a Fitbit devices on an existing Fitbit account, please try the following steps: 

1. From the Today tab in the Fitbit app on your phone, tap the devices icon.
2. Tap Add more devices.
3. Choose your device and follow the on-screen instructions to continue.

If you keep encountering issues with your Fitbit device setup, refer to Why can't I set up my Fitbit device?