App crashes when trying to access sleep data

[Colly]

For a few weeks now the app freezes or crashes when I try to review my sleep data. I see this was happening to other back in March, and I keep the app up to date and am still having this issue.

[LiliyaFitbit]

Welcome to the Fitbit Community, @Colly.

Thanks for the details shared in your post. I recommend trying 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 and log back into your account.

If the issue persists and you're using Apple iOS 13 or higher, please try uninstalling and reinstalling the Fitbit app. 

Hope this helps.