I was using Electrum 3.0.2 on OSX Sierra fine and now I get Failed to Compile Output errors when sending. Upgraded Keepkey to latest firmware too. Any known issues or fixes for this?
First you should upgrade to latest Electrum (be sure to download only from here :
https://electrum.org/#home ) and make sure to have backup of your seed in case you need restore your wallet.
There seems to be problems with SegWit and multisig wallets related to your problem,in some cases users report that they get such error.You should try to upgrade to latest Electrum and see if this solve your problem.If problem is not solved try contact KeepKey support and also developer of Electrum.
