Page 7 talks about the parking garage: "Abundant cracking and spalling of varying degrees was observed concrete columns, beams, and walls. Several sizeable spalls were noted in both the topside of the entrance drive ramp underside of the pool / entrance drive / planter slabs, included instances with exposed, deteriorating rebar Though some of this damage is minor, most of the concrete deterioration needs to be repaired in a timely fashion."
Page 8 has relevant photos.
The NPR article seems to focus on the deck slabs, but they are not particularly load-bearing so are unlikely to be the cause of the building to collapse. Edit: I guess it is possible the failure of a deck slab could collapse the columns inwards, but my guess is that the columns failed (bending or collapsing).
Spalling on columns is a problem, especially if it is due to the column starting to fail.
Disclaimer: I am not a structural engineer.