We are working on a project and decided to use IBR DTN. We followed the tutorial (https://github.com/ibrdtn/ibrdtn/wiki/IBR-DTN-Tutorial:-a-step-by-step-guide). However, this problem persists:

ian@localhost:/etc/ibrdtn$ dtnd -i wlp6s0 -c sample.conf
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: IBR-DTN daemon 1.0.1 (build 294b543)
Thu Feb  8 12:37:52 2018 INFO Configuration: Configuration: sample.conf
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: use logfile for output: /var/log/ibrdtn/ibrdtn.log
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: Parallel event processing enabled using 4 processes.
Thu Feb  8 12:37:52 2018 INFO BundleCore: Local node name: dtn://localhost
Thu Feb  8 12:37:52 2018 INFO BundleCore: Forwarding of bundles enabled.
Thu Feb  8 12:37:52 2018 INFO SecurityKeyManager: initialized; path: /etc/ibrdtn/bpsec
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: using bundle storage in memory-only mode
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: API initialized using tcp socket: any:4550
Thu Feb  8 12:37:52 2018 INFO NativeDaemon: TCP ConvergenceLayer added on wlp6s0:4556
Thu Feb  8 12:37:52 2018 INFO DiscoveryAgent: listen to [224.0.0.142]:4551
Thu Feb  8 12:37:52 2018 INFO DiscoveryAgent: listen to [ff02::142]:4551
Thu Feb  8 12:37:52 2018 INFO DiscoveryAgent: add interface wlp6s0
Thu Feb  8 12:37:52 2018 ERROR TCPConvergenceLayer: bind failed (failed to getaddrinfo with address: [fe80::3349:6f45:a0bf:48b0%wlp6s0]:4556 (link))
Thu Feb  8 12:37:52 2018 INFO DHTNameService: DHT initialized on Port: 9999 with ID:
Thu Feb  8 12:37:53 2018 ERROR IPNDAgent: Join failed on wlp6s0 ([fe80::3349:6f45:a0bf:48b0%wlp6s0]:4551 (link), family: 10); failed to getaddrinfo with address: [fe80::3349:6f45:a0bf:48b0%wlp6s0]:4551 (link)