Today came the update.
Installed, worked for some time in the system.
Tried to run skype, terminal. Programs did not start.
Rebooted the system, the whole process ended with errors and the system does not boot.
I went into recovery mode, tried to start - the result is the same. I looked in the internet, found a similar problem. Advised to remove the nvidia driver - did not help.
OC Ubuntu 18.04, kernel 4.15.0-62