I'm trying to convert my .mxd Projects into .qgs files. For that I downloaded the following Toolbox and went through all the steps. https://github.com/fitnr/mxd2qgs
The Toolbox appears on my ArcToolbox list but when I'm trying to use it I get the following Error: "The tool that is linked with this script is not available."
Now I don't know what to do next. How do I get it to work?