Your profile of the empact project (https://www.openhub.net/p/empact) says the following:
No recognizable code
Open Hub computes statistics on FOSS projects by examining source code and commit history in source code management systems. This project has code locations but that location contains no recognizable source code for Open Hub to analyze.
However, the codebase is hosted correctly on sourceforge. Your crawler used to pick it up some time ago. But now, they seem to have a regression in your subversion crawler module. Here's the source of the project on sourceforge.