What happened and where did the OpenMul SDN controller project go?

Question

Telecommunications

This controller is of interest from the point of view of its use in research work, but there is no way to find documentation for it, since all official sites have stopped supporting it. It would be nice if you had a link to documentation or other resources. But still, the question remains why the project was closed (according to the official website in 2021) and where all the information disappeared, perhaps with the exception of the code on GitHub, which cannot be understood without documents.