HTTPS Securely issue

[Carlos.CS]

Dear Fitbit Support team,
When users log in with Google to authorize our app and grant permission to access Fitbit data, they receive a warning message: Warning! The app is not using HTTPS to obtain your permission securely
Even though we are using HTTPS and the device's browser, this caution still appears. Interestingly, our staging app does not show this warning, but our production app does, despite both having the same HTTPS redirect URL configuration.
Could you please advise on how to resolve this issue? I appreciate your support in advance.

[Carlos.CS]

Product AppStaging App

[IncaFitbit]

Hi @Carlos.CS 

Thank you for reaching out. 

Can you share below information to us, we will try to reproduce this problem.
1. Where to download this app.
2. The instruction to go through the authorize flow on this app.

If this app uses https:// in the authorization URL, then that error should not appear.

Inca