Delphi FMX for iOS Simulator error: Debugger Assertion Failure: "obj" in ..\win32src\rproxy.cpp

Using a new blank Delphi FMX project for iOS Simulator on Rio the project seems to pass the "compile" and "deploy" phases but looks frozen at "installing". And ends with the error:

Debugger Assertion Failure: "obj"
in ..\win32src\rproxy.cpp at line 663