Not sure what’s going on there, so I’ve brought it up internally to try to get some clarity.
Given your topside application is saying the UDP port is in use, it would seem like there’s something else on your topside computer that’s connected to the same port, but if that’s the case I would expect it to also fail to connect when using the Companion software instead of BlueOS. Does it work to use a different port, and/or does it work after restarting your topside computer, or with a different computer?