Unable to complete authorization for Teams to access GitHub

[odebroqueville]

I'm using Teams Version 1.2.00.28258 (last updated on 05/11/2019) on macOS Catalina 10.15.1.

In the desktop Teams app, I clicked on 'Apps' and then selected GitHub. I then clicked on the 'Sign In' button and noticed the following message:

"Please note that GitHub no longer supports your web browser.
We recommend upgrading to the latest Google Chrome or Firefox."

Yet, I'm using the latest versions of Firefox (70.0.1) and Brave (Version 0.70.123 Chromium: 78.0.3904.97 (Official Build) (64-bit)) for Mac! Also, Firefox is set as my default browser.

Despite the message, I was able to sign in but couldn't get past the authorization screen because the green button was disabled (please see screenshot below).

[#2]

same problem under Mojave and Microsoft Teams Version 1.2.00.28258.

[#3]

same for me on windows 10,  Version 1.2.00.27559

[#4]

@odebroqueville Same problem here

[#5]

Hi,

I just tried again the connection with GitHub (1.3) in Microsoft Teams (1.2.00.28258) under Mac 10.15.2, and now it works !?!