Not got this on mine. Sure it's the latch and not the roof frame? Mine creaks over bumps.
Is the latch on too tight? Try loosening it if it is.. or is it too loose, and wiggling about? Maybe try putting some grease on the spring as that could be what is creaking?
Fold the top open, open the latch, pop open the plastic cover (you'll see what I mean), adjust the adjustment nut with a spanner (I think it's 10mm). Simple as