This is a bug in application.py where we expected the call to create an application service to raise an HTTPError, which was happening in versions prior to 12.1.0. This is now fixed on the BIG-IP and when testing against 12.1.0, it revealed a bug in our code where (in the happy path) we weren't returning the result from the call to super()._create(). That was returning None as the object back from a create call.
This is a bug in application.py where we expected the call to create an application service to raise an HTTPError, which was happening in versions prior to 12.1.0. This is now fixed on the BIG-IP and when testing against 12.1.0, it revealed a bug in our code where (in the happy path) we weren't returning the result from the call to super()._create(). That was returning None as the object back from a create call.