1-31-20 update: We have confirmation that this quest could be completed as of 1-30-20. Please try again.
Scouting Report: Hostile Natives does not progress - #30 by Bhrodo-moon-guard
For players experiencing quest blockers in Pandaria / The Jade Forest, specifically the Horde’s Scouting Report: Hostile Natives and Alliance SI:7 equivalent:
The bug was regressed on 1-17-20 in the new PTR build 8.3.0.33084. The quest still cannot be completed.
Since this is the same build now on Retail, the assumption is the bug still exists there as well.