congrats on winning the key for Gunslugs - I've just tested the key and it's working correctly - please try again and when it works please leave positive feedback.
If you do not respond by the end of the week then I will presume that you don't want the key.
Yep - me too. Not sure why though.
Might be just a bug in their code - sometimes it works for me, and sometimes it doesn't. Never seen this error before the last few days and I've been playing the challenges for years.