This message rely on Qgis couldn't find the classFactory method to use this plugin. As this plugin is not in the official repo you need to install it manually and take care of some points :
- Be sure that your python interpreter have the scipy an openpyxl libs install. This is because the plugins rely on them. From the osgeo console (on Windows) or from a the bash console (in linux) execute
python
and try to import the libs : import scipy
and import openpyxl
if none of them return any errors they are installed. If not you need to install them with pip or easy_install. like so : pip install scipy
and for the other one pip install openpyxl
- Grab the 2 folders
GniPlannerFTTH
and WorkContextTracer
and put them in the *user_home_directory*/.qgis2/python/plugins/
- Then you should able to activate them without errors.