Error after implementing note 1670504

Hi all.

After implementing note 1670504 - AC 10.0 Risk Owner Wokrflow Agent - Class Based RuleI am implem, in order to include the risk owner into the MSMP process i am facing an error where MSMP indicates that class ZCL_GRAC_WFA_RISK_OWNER does not return any approver. However i have already assign a Risk Owner for the risks involved. Please see image below.

I have check the class ZCL_GRAC_WFA_RISK_OWNER and i realize that attribute M_RISKS_RETRIEVED and the type ABAP_BOOL seems not be recognized as any description appears into the defintion field. Could be that error? If so how i do define ABAP_BOOL?

Kind regards and thank you.

Sara.