logcat says
ARToolkit: Init starter
ARToolkit: Param load start
ARToolkit:Error: Camera parameter load error !!
ARtoolkit directory is already added in project’s package settings -> additional non asset directories to copy.
I only see a saved folder in /storage/emulated/0/UE4game/YOUR_APP_NAME/YOUR_APP_NAME/
no content folder at all and if i manually copy it onto the phone, the logs shows that it got through all of the plugin loading but the game also never opens appearing to crash on some widget.