Problems installing elementary tweaks in Juno

Question

Following these steps:

sudo add-apt-repository -y ppa:philip.scott/elementary-tweaks
sudo apt update
sudo apt install elementary-tweaks

I get this output, indicating an error:

guillermo@guillermo-Elementary:/media/Aplicaciones/LibreOffice_6.0.6.2_Linux_x86-64_deb$ sudo add-apt-repository -y ppa:philip.scott/elementary-tweaks
Traceback (most recent call last):
  File "/usr/bin/add-apt-repository", line 107, in <module>
    sp = SoftwareProperties(options=options)
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 128, in __init__
    self.reload_sourceslist()
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 623, in reload_sourceslist
    self.distro.get_sources(self.sourceslist)    
  File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 93, in get_sources
    (self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for elementary/juno

Any help please?

Answer 1

Did you install software-properties-common?

Answer 2

run these commands and paste them

$ egrep -v '^#|^ *$' /etc/apt/sources.list /etc/apt/sources.list.d/*

$ cat /etc/lsb-release

this is my lsb-release file

DISTRIB_ID=elementary
DISTRIB_RELEASE=5.0
DISTRIB_CODENAME=juno
DISTRIB_DESCRIPTION="elementary OS 5.0 Juno"

if yours is different, write it like mine

$ sudo nano /etc/lsb-release

(you can change nano and use another editor to do the job)