If you're conducting business through a TAILS USB, you'll probably get a notification the next time you try to send BTC to any address. The default TAILS version of Electrum, 1.9.1, is too out of date to interact with the most current version, 2.5.1
Don't worry though -- your BTC are safe. Tails will probably upgrade Electrum to newest version for their next patch. In the meantime, however, you can install the most recent Electrum wallet directly into your persistent volume, and boot your wallet from there until the new version hits.
Here's how: https://www.reddit.com/r/tails/comments/34ex0d/need_help_updating_electrum_198_on_tails_132/
I was running it fine manually yesterday, today it won't work. what the fuh