Quote from: Saint-loup on Today at 03:30:01 PM

Could you clarify something please?
Do you remember if you have been able to recover your wallet on Tails at least one time before upgrading the Electrum software?

Hello

Absolutely, mentioned few times now.
Yes, I did recover my "lost" wallet on Tails twice, before upgrading the Electrum software.

Quote from: Saint-loup on Today at 03:30:01 PM

Because as I understand, you've created your wallet and its seed on MS Windows first.

No, I have created that wallet on Tails.

I did create also one on Windows but never had any problems with. Problems only with Tails Electrum wallet

Quote from: Saint-loup on Today at 03:30:01 PM

But Electrum is using UTF-8 character encoding, so maybe the (UTF-8) character set that has been used to create your seed on MS Windows is not the same as the one used on Tails?

In order to eliminate the dependency on a fixed wordlist, the master private key and the version number are both obtained by hashes of the UTF8 normalized seed phrase.
[/qoute]
First I need to understand what that means in order to answer on that one but as mentioned above wallet was created on Tails OS.

But maybe this what you wrote has to do with the issue because the seed was generated in older version.