I believe the solutions posts for 3.0.1 from the forum would/should work for 3.0.2 too, i.e. s. the conversation here: Article statistics showing 0 abstract views and 0 PDF downloads - #2 by bozana
and maybe here:
Display PDF and Abstract view number - #3 by Rania_Azad
or maybe this as well:
OJS Usage Statistics - #16 by kawahyu
Tell if it is not working for you…
Best,
Bozana