[BUG]-Endpoints registered to improper parent device fail as an unknown device type #17
Description
Describe the bug
When you attempt to register a device to an improper parent, the device registration failure reason is for unknown device type. This ambiguous and makes it difficult to track down issues
Stacktrace
Include a stack trace of the exception if possible.
Paste stack trace here
To Reproduce
Steps to reproduce the behavior:
Attempt to load a DM Transmitter device registered to a key that does not exist.
Expected behavior
The error should read that the device has nothing to register to, not that it's an unknown device type
Screenshots
Additional context
Discovered by client