How have you been using Electrum and Nano S on an offline machine?

I have been unable to get unsigned transactions to be signed by Electrum and Nano S on an offline machine (never connected).

Error: "no interface to do request on ... gave up"


I am unsure whether it is due to Electrum not having UTXO's history or due to another part of the set-up requiring a direct connect.



(Online computer using Electrum watch-only wallet, Electrum Personal Server, Bitcoin Core, and a USB to save the unsigned transaction to).


Edit - Created its own topic.