dpkg – Unable to reinstall ubuntu-advantage-tools

hiren@my-dell:~$ sudo apt-get install –reinstall ubuntu-advantage-tools
Reading package lists… Done
Building dependency tree
Reading state information… Done
0 to upgrade, 0 to newly install, 1 reinstalled, 0 to remove and 1 not to upgrade.
Need to get 47.3 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://mirror.fsf.org/trisquel belenos-updates/main amd64 ubuntu-advantage-tools amd64 19.6~ubuntu14.04.4 (47.3 kB)
Fetched 47.3 kB in 7s (6,293 B/s)
dpkg: warning: files list file for package ‘ubuntu-advantage-tools’ missing; assuming package has no files currently installed
(Reading database … 238711 files and directories currently installed.)
Preparing to unpack …/ubuntu-advantage-tools_19.6~ubuntu14.04.4_amd64.deb …
Unpacking ubuntu-advantage-tools (19.6~ubuntu14.04.4) over (19.6~ubuntu14.04.4) …
Processing triggers for man-db (2.7.5-1) …
Setting up ubuntu-advantage-tools (19.6~ubuntu14.04.4) …
/var/lib/dpkg/info/ubuntu-advantage-tools.postinst: 5: .: Can’t open /etc/os-release
dpkg: error processing package ubuntu-advantage-tools (–configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)