Of course the Owners Corporation can be liable, it’s called occupier’s liability. Why do OC’s have public liability insurance? Being a strata scheme doesn’t exempt an Owners Corporation from that kind of thing.
For example refer here, where the strata manager was held liable in part.
https://www.austlii.edu.au/au/cases/nsw/NSWCA/2010/180.html
And this one, where someone tripped on a driveway.
https://www.austlii.edu.au/au/cases/nsw/NSWCA/2005/256.html