Have you checked that you have enough RC ?
Have you tried changing the RPC node to api.deathwing.me ?
What s the error shown by Keychain ? Remove the whitelist of the operation on Keychain settings, and validate each transaction manually, then you ll be able to see if Keychain throws an error at some point.

EDIT : I've tested it and I see the issue, im checking.
EDIT 2 : Fixed! The update should be live in a few hours