⭐ Merited by o_e_l_e_o (4)
The wallet is set up as a 2/3 multi-sig wallet, with #1 being Electrum, #2 being Trezor One, and #3 being Ledger Nano S.
When I try to sign a transaction with Electrum (and then sign + broadcast with Ledger Nano S), it won't work because Electrum won't detect the Ledger Nano S.
When I try to sign a transaction with Electrum (and then sign + broadcast with Trezor One), it won't work because of the error "DataError: Expected input with amount".
Another thought occurred to me... Do you just have one wallet file setup within Electrum... or did you create different wallet files for each hardware device using the Master Public Keys from the other device and the "normal" Electrum wallet? When I try to sign a transaction with Electrum (and then sign + broadcast with Ledger Nano S), it won't work because Electrum won't detect the Ledger Nano S.
When I try to sign a transaction with Electrum (and then sign + broadcast with Trezor One), it won't work because of the error "DataError: Expected input with amount".
I was just mucking around testing some stuff... and found that the Ledger detection could be a bit "odd" with multiple wallets open within Electrum.