With Tasker 4.9u4m with the latest App Factory,
They are not compatible, you have to use the latest Tasker with the latest App Factory.
Pent
Can an incompatible App Factory be installed from Play Store onto an Android 4.3 device? Since Tasker 5.x would not be offered in Play Store for an Android 4.3 device, I would expect an incompatible version of the App Factory to also not be offered.