package ushare 1.1a-0ubuntu10 failed to install/upgrade: installed ushare package post-installation script subprocess returned error exit status 1

[tellapu]

While installing ushare on a new Ubuntu 18.04 install.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: ushare 1.1a-0ubuntu10
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
Date: Tue May 1 10:55:20 2018
ErrorMessage: installed ushare package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-05-01 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: ushare
Title: package ushare 1.1a-0ubuntu10 failed to install/upgrade: installed ushare package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[tellapu (tellapu)]

After purging the ushare package, I tried again today, but I still get the error above. This is displayed in the terminal:
The following NEW packages will be installed
  ushare
0 to upgrade, 1 to newly install, 0 to remove and 2 not to upgrade.
Need to get 0 B/53.4 kB of archives.
After this operation, 193 kB of additional disk space will be used.
Preconfiguring packages ...
Selecting previously unselected package ushare.
(Reading database ... 234669 files and directories currently installed.)
Preparing to unpack .../ushare_1.1a-0ubuntu10_amd64.deb ...
Unpacking ushare (1.1a-0ubuntu10) ...
Processing triggers for ureadahead (0.100.0-20) ...
Processing triggers for systemd (237-3ubuntu10) ...
Processing triggers for man-db (2.8.3-2) ...
Setting up ushare (1.1a-0ubuntu10) ...
Job for ushare.service failed because the control process exited with error code.
See "systemctl status ushare.service" and "journalctl -xe" for details.
invoke-rc.d: initscript ushare, action "start" failed.
● ushare.service - LSB: uShare
   Loaded: loaded (/etc/init.d/ushare; generated)
   Active: failed (Result: exit-code) since Sat 2018-06-02 12:14:03 +08; 8ms ago
     Docs: man:systemd-sysv-generator(8)
  Process: 23107 ExecStart=/etc/init.d/ushare start (code=exited, status=2)

Jun 02 12:14:03 USER systemd[1]: Starting LSB: uShare...
Jun 02 12:14:03 USER ushare[23107]: /etc/init.d/ushare: 31: .: Can't open /etc/default/rcS
Jun 02 12:14:03 USER systemd[1]: ushare.service: Control process exited, code=exited status=2
Jun 02 12:14:03 USER systemd[1]: ushare.service: Failed with result 'exit-code'.
Jun 02 12:14:03 USER systemd[1]: Failed to start LSB: uShare.
dpkg: error processing package ushare (--configure):
 installed ushare package post-installation script subprocess returned error exit status 1
Processing triggers for ureadahead (0.100.0-20) ...
Processing triggers for systemd (237-3ubuntu10) ...
Errors were encountered while processing:
 ushare
E: Sub-process /usr/bin/dpkg returned an error code (1)

Any help would be very much appreciated as I need ushare very much!

[tellapu (tellapu)]

Any help on this would be much appreciated as I have relied on ushare very much.