Nautilus GUI does not work

[L_M]

Dear Nautilus development and bug report staff,

on a fresh Linux install I just used Arduino IDE and Matlab R2019b, then attached an external usb hard disk and my smartphone for a file transfer, and everything worked. The day after, the white nautilus folder icon on the left bar could not make me open the folders, I could do it just from the terminal.
So I used:

sudo dpkg-reconfigure --default-priority nautilus

and everything seemed to be fine. The day after, the white folder icon was not working, and the folders that I put on the desktop disappeared. I then used:

sudo apt-get purge nautilus

then log off, then

sudo apt-get install nautilus

but nothing changed. What can I do to restore the GUI. Now I just can use the CLI.
I have (through lsb_release -rd):
Description: Ubuntu 19.04
Release: 19.04

and (through apt-cache policy nautilus:
nautilus:
  Installato: 1:3.32.1-0ubuntu0.19.04.0
  Candidato: 1:3.32.1-0ubuntu0.19.04.0
  Tabella versione:
 *** 1:3.32.1-0ubuntu0.19.04.0 500
        500 http://it.archive.ubuntu.com/ubuntu disco-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.32.0-0ubuntu2 500
        500 http://it.archive.ubuntu.com/ubuntu disco/main amd64 Packages

I already looked for similar issues in Ask Ubuntu. Best regards.

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you add your 'journalctl -b 0' log to the bug after triggering the issue?
What happens if you try to start nautilus from a command line? is any error printed?

[Launchpad Janitor (janitor)]

[Expired for nautilus (Ubuntu) because there has been no activity for 60 days.]