This is not built-in, so you must be using custom code. Quite likely you added a parent app without the child app code. Re-visiting the installation instructions you (hopefully) followed should tell you what step you missed.
A quick search shows you were probably doing this, and the missing app name matches the child app exactly:
If you missed that, be sure you also didn't miss the driver. There are three pieces of code total, and two are apps and one is a driver (so that will be Drivers Code instead of Apps Code).
