Manuel G. answered 27d
Computer/Electrical Engineering Fundamentals Tutor
Hello! I notice that you are linking a specific implementation of the en/decapsulators. Is there a chance that you do not have the proper OS requirements? From what I was capable of finding, these programs were implemented in 2009 (as shown by the Tampere University research paper) and these would most likely require a legacy version of some Linux distribution if they are not actively maintained.
If you tried to implement this in a modern system you would have a hard time as Java, Linux Kernel and Hardware versions are very likely outdated.