HELP CODE ERROR: NIGHTINGALE

Sorry to hear it. Please try holding the power button on the console for 10 seconds until it shuts down then unplug it and let it sit for 5 minutes. Hopefully that will fix the issue for you.

This notorious error message which often appears to users playing Destiny or Destiny 2 is usually accompanied with the error code Nightingale and the “Failed to Download Configuration Files” message is not allowing users to continue playing the game
before something is done to get rid of the error.

1. Go to the Xbox One Dashboard and press the Options button on the controller you are using.
2. Navigate to Network >> Advanced Settings >> DNS Settings >> Manual.
3. Enter the first address from Command Prompt for the Primary DNS and the second one for the Secondary DNS. Click Enter the both times to confirm and press the B button to save the changes
4. Restart your Xbox One, restart Destiny, and check to see if the error code still appears on your console.

Does the game launch without issues after the error code? I was experiencing something similar, with various random error codes. What I found was if you, like me, have your console set to Energy Saving Mode, (so that it downloads updates in the background
and keeps apps updated.) This is essentially a sleep function and the Xbox unless Powerered Off completely by selecting the Xbox Home Button on your controller, pressing left on the joystick and navigating down to the Settings Gear Icon, which then gives
you the option to Reset, and Turn Off Console, (essentially the same as holding the power button on the console for 10 seconds.) If you are not closing the Destiny Game first, and are commanding Cortona to Turn Off the Console or Just holding the Controller Home
Button until turn off appears, you are essentially leaving Destiny running in the background. While the console is sleeping, Bungie flags your account as inactive and kicks you off, which then presents an error when powering the console back on. The same
can be said for commanding Cortona to "Turn Off" The Xbox. This is also not a true power down, unless you do not have energy saving mode on in the options, which if I remember correctly is on by default unless otherwise changed by the user. I had the exact
same issue until I realized it was just Bungie kicking me off the server due to inactivity while my console was sleeping. Try pressing the Home button before powering off. Highlight Destiny and then press menu and close it manually....I bet you won't see
the error code anymore. Well aside from the occasional random which is on Bungie's end. Hope this solves your issues. If not, I would investigate your nat. Make sure it is open, and also dig into the Bungie forums and ensure that the Ports they recommend
you to forward are being forwarded through your router. It may take a few to find but Bungie does have specific ports that they tell you to open to maximize chad and gameplay quality.

if its just this game you get errors on then you probably need to check the developers support pages

I'm getting the same problem did you ever find a solution