interviewCompleted is false, so the pairing was not successful. Try re-pairing, it might take a few attempts with those Aqara devices (they are also very picky when it comes to connecting to other nodes, they don’t want to connect to every type of router).
If pairing does not work, try replacing the battery, it might be that the battery inside the magic cube has not enough power left to finish the interview, or try moving the magic cube closer to your zigbee adapter.
I am also using a few magic cubes. Sometimes they pair at the first attempt without any issues, but with other cubes I needed to re-pair 10 times before the pairing was successful.