Charge 4 - Synchronise agenda's with tracker in the mobile Fitbit-app

[Per01]

My screen shows 'synchronise agenda's with tracker in the mobile Fitbit-app' 

I cant find this in the fitbit app. Does anybody know how this works?

Moderator edit:  updated subject for clarity

[JuanFitbit]

@Per01 , Nice to see you here. Thank you for your message and for describing the error message. 

To set up the Agenda app: 

1. In the Fitbit app on your phone, tap the Today tab>your profile picture>Charge 4>Gallery>  Agenda. You might need to swipe up to find the app.
2. Tap Settings. You’ll see all calendars linked to the default calendar app on your phone.
3. Adjust the settings to choose which calendars to show on your device, the color for events linked to each calendar, and whether you want to see blocks of free time.

You must allow the Agenda app to access your calendar and run in the background. For more information about adjusting an app’s permissions, see How do I install and manage apps on my Fitbit device?

If your events don't appear, check the following settings:

• Location services must be turned on for the Fitbit app. For instructions, see How do I use GPS on my Fitbit device?
• Calendar access must be turned on for the Fitbit app:
  • In iPhones, open the Settings app on your phone> Fitbit >   make sure Calendars is turned on.
  • In Android phones, open the Settings app on your phone > Apps > Fitbit >Permissions > Calendar   make sure the access is set to Allow.

Hope this helps