Hello and welcome!
OK, heres the deal:
I am assuming you didnt write the MIDI for this project right?
When you download MIDI projects, they often contain some rogue controls and commands. Cant ever say exactly why, cant say what the person who wrote it was thinking, or if its simply a mistake. But I can tell you it is common.
Specific to this project, yes, played from the start, track 4 has no sound.
Open the sound tab for track 4 and click on the drop down window for CC's as shown.
Note that you will see several of the options are darkened, indicating there is some kind of related program data for each:
Clicking on volume, And then examining closely, We see there is a data point at the start of that MIDI clip that sets the volume to zero:
You have two viable options for a quick solution.
One would be to clear the data and let the clip go to a default setting.
The other, simply drag the volume data point up:
And now track 4 plays.
A couple more things. One of the strange things you may experience is that if you fiddle with things, sometimes you get sound playing from some point of the track, but if you re-start from the beginning, that command resets it to zero.
Secondly, if you import MIDI that someone else programmed, it can be a good learning experience. It can also contain headaches like this.
I actually recommend this for educational purposes, and highly suggest using it as a foundation, and experimenting with altering it, and "making it your own" so to speak.
Note that a setting exists for stripping the file of those commands upon import.
Suggestion, start with nothing but velocity. Keep it simple at first, but don't be afraid to explore everything!