How can I find out the reason for an aborted takeoff?
In addition to listening to ATC audio recordings as suggested by previous answers or comments, you can also try to visualize the traffic situation at the time of the event using the playback feature of flight tracking websites like FlightRadar24.

On those radar images, you can possibly see other aircraft, whether there was the danger of an imminent runway incursion, maybe the go-around of another aircraft nearby or something similar which prompted ATC to cancel the takeoff clearance. If you combine those radar playbacks with the audio recordings that you already know, you might get a pretty accurate picture of what actually happened.