Program exits with Command Error -1 when attempting to play through a dongle

[Managor]

I'm unable to play midi files wirelessly through the dongle.

[Roboron3042]

libusb: error [submit_control_transfer] submiturb failed, errno=16

That seems to mean that the device is busy.

If I change the interface to 2 it works, but it does not play any notes. I don't know how to fix this.