Including RobotAPI/libraries/aron/common/aron_conversions.h is not sufficient to convert aron instances of the Marker class, as common/aron_conversions.h does not include common/aron_conversions/framed.h.
This merge request suggests to add an include of common/aron_conversions/framed.h to armem_objects/aron_conversions.cpp.
An alternative would be to extend common/aron_conversions.h to include common/aron_conversions/framed.h as well. However, as this increases the amount of included code also in cases where it is not needed, I prefer the previously mentioned option, which is reflected in this merge request.