2. Where did you download electrum from? And how did you do it? Did you verify the pgp signature ? -
1) On Tails it's already preinstalled, but old version, so you have to update manually. To do that - I downloaded the ''Appimage" for Linux on electrum.org. Where as well I found the explanation why my wallet didn't work - it was old!
And that's where it started instead of just updating it, the guide lines on Tails website say - to delete the wallet; to delete the wallet folder in the wallet; to do this, to do that.... All bullsh!t. In realty just to update the f*cking wallet!
Old version ok, but which one? Do you know the number of this version? Is it a version below 2.0?
BTW do you have the master public key of your "former" tails wallet ?
Another thing, did you try to come back to the older version and to import your seed? (you don't need to access the network for that) You still don't find your address there?