gazebo_camera triggers a false error

[Nicogene]

When I try to open a gazebo_camera plugin with a .ini file like this one:

[include "gazebo_icub_robotname.ini"]

device grabberDual
subdevice gazebo_camera
name /${gazeboYarpPluginsRobotName}/depthCamera_rgb/camera:o
framerate 30
stamp 1

I get this output

[DEBUG] GazeboYarpCamera Plugin: sensor scoped name is  default::iCub::chest::realsense_chest_rgb
[WARNING] |yarp.device.grabberDual| Period parameter not found, using default of 0.03 s
[WARNING] |yarp.device.grabberDual| 'capabilities' parameter not found or misspelled, the option available are COLOR(default) and RAW, using default
[INFO] |yarp.os.Port| Port /icubSim/depthCamera_rgb/camera:o/rpc active at tcp://172.24.122.3:10049/
[INFO] |yarp.os.Port| Port /icubSim/depthCamera_rgb/camera:o active at tcp://172.24.122.3:10050/
[INFO] |yarp.dev.PolyDriver| Created device <gazebo_camera>. See C++ class GazeboYarpCameraDriver for documentation.
[WARNING] |yarp.device.grabberDual| Targets has not IVisualParamInterface, some features cannot be available
[INFO] |yarp.dev.PolyDriver| Created wrapper <grabberDual>. See C++ class ServerGrabber for documentation.
[INFO] Loaded GazeboYarpCamera Plugin correctly
[ERROR] Unable to get the iFrameGrabberImage interface from the device

and then the device opens and works fine.

The row that triggers that error is:

gazebo-yarp-plugins/plugins/camera/src/Camera.cc

Line 89 in 3fa2c45

yError() << "Unable to get the iFrameGrabberImage interface from the device";