An exception that can be translated down to a specific error in the transport.
Transport exceptions describe the HTTP/WebSocket error code associated with them, allowing Lagom to send an error
code specific to the type of error. They also have an exception message, which is used both to capture exception
details, as well as to identify the exception, so that the right type of exception can be deserialized at the other
(Since version 2.11.0) Use Throwable#getStackTrace