Can't pair to light

[zzggbb]

This isn't really a problem with your library, since I haven't been able to use your library, because I can't pair to my light. The Hue BT app seems to be deprecated. The Hue BT app is still available in the android app store, but when running it, it just redirects to the regular Hue app. Within the regular Hue app I don't see any way of enabling Amazon Alexa. Nor do I see any settings for any other voice assistants. Therefore I can't follow this step:

In the Hue BT app, go to Settings > Voice Assistants > Amazon Alexa and tap Make visible.

When I try to pair, this is what happens:

    $ sudo bluetoothctl
    Agent registered
    [CHG] Controller 00:28:F8:5B:5E:5E Pairable: yes
    [bluetooth]# power on
    Changing power on succeeded
    [bluetooth]# scan on
    Discovery started
    [CHG] Controller 00:28:F8:5B:5E:5E Discovering: yes
    [NEW] Device FF:FA:CC:E6:73:0D light1
    [bluetooth]# pair FF:FA:CC:E6:73:0D
    Attempting to pair with FF:FA:CC:E6:73:0D
    [CHG] Device FF:FA:CC:E6:73:0D Connected: yes
    Failed to pair: org.bluez.Error.AuthenticationFailed
    [CHG] Device FF:FA:CC:E6:73:0D Connected: no
    $

I get the error message Failed to pair: org.bluez.Error.AuthenticationFailed with all of my 4 lights. Do you know how to help?