Weak ratings
Apparently the premiere only garnered 5.1 million viewers and episode 2 only managed to bring in 3.79 million viewers.
You can compare that to another ABC show that premiered the same week, Manifest, which pulled 10.4 million viewers for the premiere and 8.45 million for the second episode.
Or to the most similar competing show out there, NBC's This Is Us, which has consistently averaged around 8-10 million viewers per episode its entire lifespan (three seasons so far).