gufw fails to start due to "ls: cannot access '/usr/lib/python*/site-packages/gufw/gufw.py': No such file or directory"

[Karl-Philipp Richter]

Invoking `gufw` in a terminal causes the program to crash immediately after authorization of firewall change due to

```
> gufw
/usr/bin/gufw: line 2: [: too many arguments
ls: cannot access '/usr/lib/python*/site-packages/gufw/gufw.py': No such file or directory
Traceback (most recent call last):
  File "/usr/share/gufw/gufw/gufw.py", line 30, in <module>
    gufw = Gufw(controler.get_frontend())
  File "/usr/share/gufw/gufw/gufw/view/gufw.py", line 80, in __init__
    self._set_initial_values()
  File "/usr/share/gufw/gufw/gufw/view/gufw.py", line 283, in _set_initial_values
    self.listening = ListeningReport(self)
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 35, in __init__
    self._show_report()
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 48, in _show_report
    self._view_report(report, self.previous_report)
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 83, in _view_report
    self.gufw.listening_model.set_value(iter_row, 1, int(line_split[1].strip())) # port
ValueError: invalid literal for int() with base 10: 'WARN:'

```

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gufw 20.04.1-1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Fri Aug 7 11:21:25 2020
InstallationDate: Installed on 2015-04-20 (1935 days ago)
InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64 (20141022.2)
PackageArchitecture: all
SourcePackage: gui-ufw
UpgradeStatus: Upgraded to focal on 2020-04-24 (104 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Willie30F (willie30f)]

Similar error for me, just without the too many arguments thingy:

```
gufw
ls: Zugriff auf '/usr/lib/python*/site-packages/gufw/gufw.py' nicht möglich: Datei oder Verzeichnis nicht gefunden
Traceback (most recent call last):
  File "/usr/share/gufw/gufw/gufw.py", line 30, in <module>
    gufw = Gufw(controler.get_frontend())
  File "/usr/share/gufw/gufw/gufw/view/gufw.py", line 80, in __init__
    self._set_initial_values()
  File "/usr/share/gufw/gufw/gufw/view/gufw.py", line 283, in _set_initial_values
    self.listening = ListeningReport(self)
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 35, in __init__
    self._show_report()
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 48, in _show_report
    self._view_report(report, self.previous_report)
  File "/usr/share/gufw/gufw/gufw/view/listening.py", line 83, in _view_report
    self.gufw.listening_model.set_value(iter_row, 1, int(line_split[1].strip())) # port
ValueError: invalid literal for int() with base 10: 'WARN:'
```
This error also appears to be happening when launching it from the menu, so not only in terminal...

[accnetdev (accnetdev)]

Hi,
Same error here on my LWS VPS under Ubuntu 20.04.1 LTS.
No workaround ?

[costales (costales)]

Hi,
I think the issue is coming from this issue:
https://github.com/costales/gufw/issues/9
Do you have installed mosh and/or ufw-extras packages?
Best regards.