Initial ingest when setting up Production resulting in error for fa-hcm-irc-candidates

Summary:

ESS job to create index definition and perform initial ingest to OSCS' parameter fa-hcm-irc-candidates. However, process is erroring out with the following error.  

ESS job FndOSCSIndexIngestJob failed with error{"message":"Index not enabled - fa-hcm-irc-candidates","status":400}

We are on 26C of the application, and are unable to search candidates under My Client Groups > Hiring > Candidate Search. We have also revalidated all redwood profile options