Upgrading LT v10 -> 11 Installer STOPS Issues

#1 add-apt-repository: command not found error in Ubuntu 18.04. Installer fails.
Proposed Solution - add this at the top of the installer (I have reported this several times and repeatedly told it is in all versions of Ubuntu, but it is not).

sudo apt-get install software-properties-common

#2 Installer STOPS

make[2]: Leaving directory ‘/root/libretime/legacy/locale’
make[1]: Leaving directory ‘/root/libretime/legacy’
make: Leaving directory ‘/root/libretime/legacy’
Install default Airtime apache configuration? (Y/n):
cp: not writing through dangling symlink ‘/usr/share/airtime/php/legacy/vendor/bin/phing’

Install stops and get a bash prompt.

File: /usr/share/airtime/php/legacy/vendor/bin/phing
Type: broken symbolic link to …/phing/phing/bin/phing
Size: 0 bytes Blocks: 0 IO Block: 4096 symbolic link

The issue continues here: