I do understand that you are very busy, but this is an official Ludei Plugin which is not working at the moment.
I guess the author / developer of this plugin can fix this issue a way faster than anybody else.
Many C2 developers do pay for their membership and it's really frustratring to know that such a feature like Game Center doesn't work anymore.
I do understand both sides, yours and the user side. I hope you'll find some time to fix this issue.
Moreover the Cocoon Service dosen't work since for 1 or 2 weeks (several bugs).
So to hear that now, is really frustrating as cocoon user.