As usual when I receive an updates notification, I clicked 'Install'. Right after, I did the requested system restart. I was able to login using my password, but:
- could not mount Truecrypt volume: cannot obtain admin permision
- lost my wired internet connection
Luckily, I had completed a Timeshift backup this morning. I restored it and everything went back to normal. Now, I have updates waiting to be installed, but I dare not install them.