The uTrack24 uses standard midi pinout on the midi connector and it should provide power as well.
Do you have a chance to try with any other midi device?
I’ve tried it on both of my uTrack24 players and both do not work. I tried it with my Behringer XR18 and Fractal Audio AxeFX and it works with both of those devices.
Does the uTrack24 sends out midi properly? I mean if you connect to any external powered midi device everything works fine?
I assume the issue may cased by the change in the midi standard (2014) . Previously the midi connector provided +5V for the external device, but with the new standard (the uTrack24 follow this) the voltage changed from +5V to +3.3V.
As I see correctly the Midi Solutions Programmable Midi Input Selector require +5V and does not work from +3.3V
I wouldn’t recommend to connect 5V to the uTrack24 midi output directly.
Instead you can use a midi power adapter like this: https://www.midisolutions.com/prodpwr.htm