Installing Liquid Feedback

I have been trying to install Liquid Feedback using Ubuntu 16.04. They have instructions on their site. These things are never as easy as it should be. Here are my notes.

See also http://www.public-software-group.org/mercurial/liquid_feedback_frontend/raw-file/tip/INSTALL.html

2017-10-29 17:54:02 GMT: Starting moonbridge server
2017-10-29 17:54:02 GMT: Loading "/opt/webmcp/bin/mcp.lua"
2017-10-29 17:54:02 GMT: Error while executing "/opt/webmcp/bin/mcp.lua": /opt/webmcp/bin/mcp.lua:112: module 'extos' not found:
2017-10-29 17:54:02 GMT: 	no field package.preload['extos']
2017-10-29 17:54:02 GMT: 	no file '/opt/mcp/lib/extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/share/lua/5.2/extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/share/lua/5.2/extos/init.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/lib/lua/5.2/extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/lib/lua/5.2/extos/init.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/share/lua/5.2/extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/usr/share/lua/5.2/extos/init.lua'
2017-10-29 17:54:02 GMT: 	no file './extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/opt/moonbridge/extos.lua'
2017-10-29 17:54:02 GMT: 	no file '/opt/mcp/accelerator/extos.so'
2017-10-29 17:54:02 GMT: 	no file '/opt/mcp/lib/extos.so'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/lib/lua/5.2/extos.so'
2017-10-29 17:54:02 GMT: 	no file '/usr/lib/x86_64-linux-gnu/lua/5.2/extos.so'
2017-10-29 17:54:02 GMT: 	no file '/usr/lib/lua/5.2/extos.so'
2017-10-29 17:54:02 GMT: 	no file '/usr/local/lib/lua/5.2/loadall.so'
2017-10-29 17:54:02 GMT: 	no file './extos.so'
2017-10-29 17:54:02 GMT: stack traceback:
2017-10-29 17:54:02 GMT: 	[C]: in function 'require'
2017-10-29 17:54:02 GMT: 	/opt/webmcp/bin/mcp.lua:112: in main chunk
2017-10-29 17:54:02 GMT: Terminating with exit code 3

I am advised as follows,

This is indeed pointing to the current installations instructions.
However, the repository tip may change any time to development versions
in the repository. We recommend to use a release instead of the
(unstable) repository tip. The current version can be found at
http://www.public-software-group.org/liquid_feedback and all revisions
are tagged accordingly in the repositories. Thus, the stable URL for
the installation instructions for version 3.2.1 of the LiquidFeedback
frontend is: 

http://www.public-software-group.org/mercurial/liquid_feedback_frontend/raw-file/v3.2.1/INSTALL.html

I found this page helpful;

1. http://www.public-software-group.org/liquid_feedback