There is no cache at the listed co-ordinates. You will not find anything useful there.
You will need to find the co-ordinates for this geocache by completing the Railway Reserve adventure lab. You will need to download the adventure lab app, finish the 5 stages for the Railway Reserve adventure lab & get the numbers for this bonus cache. The link to the adventure lab can be found here.
https://adventurelab.page.link/cbzC
The final co-ordinates can be found at:
S 41 18.ABC E 173 14.DEF
UPDATE: 11/2/2024
Cache has been replaced, area looks like it has been disturbed from gardeners or preparations for lights in railway reserve. You are looking for a blue mint tin containing logbook (bit of paper) and a pencil.