Error while adding PPA on elementary OS freya

Question

Whenever i try to add any PPA it shows me the following error

Traceback (most recent call last):
  File "/usr/bin/add-apt-repository", line 91, in 
    sp = SoftwareProperties(options=options)
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 109, in __init__
    self.reload_sourceslist()
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 599, in reload_sourceslist
    self.distro.get_sources(self.sourceslist)    
  File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 89, in get_sources
    (self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Ubuntu/n/a`` 

Output of cat /etc/lsb-release (editing it to elementary-os did not solve the problem)

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.4 LTS"

Output of cat /etc/os-release

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="14.04.4 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.4 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"

Solution at "could not find a distribution template for Ubuntu/n/a" error in elementary OS does not solve my problem.

Answer 1

That line 91 line 109 ordeal was a bug. Most of the tickets I found in Launchpad (the bug tracker) went ultimately unresolved, but perhaps they just weren't the main ticket.

Have you tried updating your system and installing "Software & Updates" to install the PPA manually?

sudo apt update
sudo apt upgrade
sudo apt install software-properties-gtk 

Has the problem been resolved and does it persist into your Loki upgrade?