Whenever I try to install any software from ubuntu software centre, I receive a message saying "cannot do that"
click on the above link to see the image that I get
When I choose to download it from terminal it says:
E: Unable to parse package file /var/lib/apt/lists/ppa.launchpad.net_snwh_pulp_ubuntu_dists_xenial_InRelease (1)
E: The package lists or status file could not be parsed or opened.
What do I suppose to do and first of all please tell me why this error is occurring?