Install using pip3 as per the instructions on https://electrum.org/#download. Don't install using the distro's repos. Those tend to have outdated versions.

If you need a script that does the installation for you try this one: https://github.com/BitcoinsPakistan/electrum-install

Edit: seems i misread the question. I know of no way to create an electrum wallet that you can spend from with arbitrary multisig private keys. You can create a watch only wallet though.

that's because you didn't install it to using sudo pip3. look into the shortcut properties and adjust the executable path to the absolute path of the electrum folder. `which electrum` in the terminal will tell you where it is located.

- Trusting that site with your seed is a bad idea. The seed is only secure if only you know it.

- The source of the random number matters more than the size of the dictionary. Who knows where that site gets its random numbers from? Electrum uses the cryptographically secure random number generator provided by your operating system. It is this that gets encoded as the seed mnemonic.

- A larger dictionary is possible. You can replace the Electrum dictionary with your own custom one. The default dictionaries are found in the wordlist subdirectory. for example in /usr/lib/python3.4/site-packages/electrum/wordlist/ on linux.

- I tried it with the EFF word list combined with the Electrum one and it only reduced the seed length from 12 words to 11. So not a big difference. The combined list with duplicate words removed is here: https://pastebin.com/Kn3J6CGa . The electrum dictionary is 2048 words while this one is nearly 9000 words.

- The words in the dictionary have to satisfy certain criteria. Similar sounding words are not a good idea. Words that have similar spellings are also out. Uncommon words are not a good idea either.

Try `sudo pip3 install qrcode` Note you have to use pip3 not just pip. pip is for python 2 while electrum uses python3 so you have to use pip3.

If that does't work then how did you install electrum in the first place? If it was using pip3 then i suggest doing `sudo pip3 uninstall electrum` and `sudo pip3 install <pathtoelectrumtarball>` again to get it to install all the dependencies.

run it in a terminal with the -v switch like  so `electrum -v`. then pastebin the output and link us here.

FYI electrum's seed mnemonic is not bip39. You can only restore your wallet using electrum.

Seed is for deterministic wallets where all the private keys are deterministically derived from the seed. In your case you imported a totally random private key.

My suggest is to create a new deterministic wallet and then sweep your private key. This way you get the seed backup you seek.

Why don't you join #electroncash on freenode so we can debug this in real time? Otherwise one gets the feeling you don't have the patience for forum threads. You can connect via your browser if you don't have an irc client: https://webchat.freenode.net/

you can also grab it from github:

https://github.com/spesmilo/electrum/blob/master/pubkeys/ThomasV.asc

Why did you advise him to create a segwit wallet? You know that's not compatible with most other wallets and sites. He's going to face problems the next time he tries to send money to his bech32 segwit wallet.  

@OP read this regarding the segwit wallet you created so you understand the implications of it: https://www.reddit.com/r/Electrum/comments/7dku5r/segwit_wallets_and_electrum/ . Electrum segwit wallets create bech32 addresses.

If you read that thread I posted above you will see that the domain was in use by a legit company in an unrelated industry. It is only in the last few weeks that the scammer acquired it from them.

It cost too much: https://www.reddit.com/r/Bitcoin/comments/8a1drz/psa_electrumcom_bought_by_scammers_to_distribute/dwv3k10/

It's not about timezones or block explorers. The bitcoin protocol doesn't care to ensure the accuracy of timestamps outside of a 2 hour range. Your clock can be off by that much and you can still mine bitcoin.

FYI timestamp in the block can be +/- 2 hours!

Are you sure tax regulations require such a high level of accuracy?

1. It will generate new change addresses when it needs to automatically

2. If computer 2 is online then once again it'll generate new addresses when it learns that it needs to. Here's a more detailed explanation https://bitcointalk.org/index.php?topic=1845025.msg18535357#msg18535357

Note that the default gap limit for receive addresses is 20 and for change addresses it's 6.

@HCP Pre 2.0 seeds were basically one large hex number that could be converted to and from the mnemonic. The chances are slim though because those were not bip32 and he talks about xprv and xpub. Here's what i looks like when I restore from hex:

http://termbin.com/1ti9

In 3.1.2 it's under wallet menu > addresses > filter

Does your seed look like the example HCP gave? That's not hex. That's base64. It's got mixed case + certain special characters. Is that what it looks like?

Alternatively if it's hex then it would be just numbers 0-9 and single case letters a-f. Is that what you are seeing?

Do you control all the cosigning devices or are they owned by other people?

To restore the wallet you need the xpubs (MPKs) of all 4 wallets and at least 2 seeds to spend. Note that the xpub can be derived from the seed so essentially you need 2 seeds + 2 xpubs belonging to the other cosigners.

You can backup wallet files by writing down the seed or making a soft copy backup via file menu > save copy. Soft copy backup will include the other cosigner's MPKs  so it's preferable.