It listed only IPv6. If the client tries to connect only via IPv4, then it wouldn't get a connection. If you try "telnet localhost 25565", does it connect? (It won't, of course, have a proper terminal connection, but it's good enough of a quick connectivity test). My telnet even lists what addresses it's actually attempting to use, so that would help, too.
As for the compilation instructions, the COMPILING.md in the repo should get you started: https://github.com/cuberite/cuberite/blo...MPILING.md
Just substitute Release in the commands with Debug (especially in the cmake line: "cmake -DCMAKE_BUILD_TYPE=DEBUG .."). The executable will be built in the Server subfolder and will be called "Cuberite_debug".
Anyway, since you have the listening sockets, it seems like it's a configuration issue, rather than Cuberite's fault.
As for the compilation instructions, the COMPILING.md in the repo should get you started: https://github.com/cuberite/cuberite/blo...MPILING.md
Just substitute Release in the commands with Debug (especially in the cmake line: "cmake -DCMAKE_BUILD_TYPE=DEBUG .."). The executable will be built in the Server subfolder and will be called "Cuberite_debug".
Anyway, since you have the listening sockets, it seems like it's a configuration issue, rather than Cuberite's fault.