Can't change my credit card on Fitbit Pay

[Endy123]

Hello,

my credit card expired, so i got renewed one.

Now I want to change it on Charge 4 via Fitbit app on Android phone.

I go to Fitbit app, go to Charge 4 device - after I click on Wallet tile and click Get Started, it says I have to set a PIN, I enter pin, than the circle is spinning and at the end it says Cannot connect to Charge 4.

But my wristband is connected no problem - is syncing data and all.. 

I tried to restart phone, but it doesn't work.  How do I proceed? thank you.

Moderator Edit: Clarified subject

[Endy123]

Exact message is:

Error

Error connecting to Charge 4

[Endy123]

Moreover, when I click the tile it says now:

Set PIN Code

Your Charge 4 already has a PIN.

Please enter the 4 digit PIN to verify

Spinning circle

Confirming PIN..

And then it says Error connecting to Charge 4

However I'm sure phone is able to communicate with Charge 4 device - I can see it sync's with no problem, i can do a test call in notification.

Also I noticed, when the app is attempting to verify PIN, Charge 4 doesn't responde for pushes.. and then it starts working again (showing clock on display etc.) but app in phone says Error connecting to Charge 4.

Hope this info helps..