Luv says "Sorry about that" -- what is she referring to?

Question

When K first meets her in the data repository, when she opens a door, she says, "Sorry about that." No idea why she says that.

Answer 1

Because the door jams half-open delaying their entry into that section of the archive:

No-one's been down here in ages.

She manually forces the door to fully open allowing them passage:

Sorry about that.

Answer 2

The original script doesn't have her apologising, but it does explain what the door jamming scene is supposed to convey; that this is an archive of ancient information that nobody accesses, and also to show that Luv is a new model Replicant (and possibly one that's even more advanced than Officer K).

LUV: Here -- all the junk is in here. Lucky for you Mr. Wallace is a data hoarder. A shard in the right shape can be a gem.

She leans into a FACIAL RECOGNITION SCAN. It unlatches -- but stops before opening. STUCK. A nuisance.

LUV: No one’s been down here in ages.

Without a break in stride she PRIES into the door seam with her FINGERS to OPEN it. A show of tremendous force. Perhaps deliberate. After you...