Custom role for requisition/candidate processing shows 'RestAction error' in create offer.

We are creating a custom role to view requisitions and process candidates up to the HR phase, but we are getting an 'error response during RestAction' in the position override section in create offer.

Initiate Job Offer	IRC_INITIATE_ JOB_OFFER_PRIV
Communicate Job Offer	IRC_COMMUNICATE_JOB_OFFER_PRIV
Redraft Job Offer After HR Phase	IRC_REDRAFT_JOB_OFFER_AFTER_HR_PHASE_PRIV
Cancel Job Offer	IRC_CANCEL_JOB_OFFER_PRIV

View Job Offer - ORA_IRC_VIEW_JOB_OFFER
Update Job Offer - ORA_IRC_UPDATE_JOB_OFFER
View Job Offer Salary - ORA_IRC_VIEW_JOB_OFFER_SALARY