Bug reports can be done through
this sticky topic.
I assume you are trying to use it with the unchained rogue? Seeing the "core" rogue can select "extra ranger trap" as a rogue talent allowing you to select another trap instead of the talent.
This said the only reason I can see it not working with unchained if this applies:
Pathfinder Unchained, pg. 8 (Introduction): "Finally, with the exception of the monk, these classes should work with any of the archetypes from previous books
as long as the classes still have the appropriate class features to replace."
I haven't compared the rogues or replaced features myself.