cd /etc/apt/
sudo gedit sources.list

#add following lines to end of the file and save it

#Bionic support 
deb http://ca.archive.ubuntu.com/ubuntu/ bionic main restricted
deb http://ca.archive.ubuntu.com/ubuntu/ bionic universe
deb http://ca.archive.ubuntu.com/ubuntu/ bionic multiverse

run:
sudo apt update
sudo apt install libssl1.0.0