Sometimes there is a synchronization problem between fitbit and phone.
Please restart your fitbit and phone and try it again. If this does not work please install another watchface and switch back to the watchface you want and change the image directly afterwards.
If you need to unlock the watchface visit this page:
https://k-pay.io/code/unlock
If you need a list of all your purchased watchface visit this page:
https://k-pay.io/lookup
If you still have some issues contact us with the contact form below.