How to specify secret for onlyoffice? NC 18

NC 18.01
OnlyOffice: 4.1.4
DocumentServer: 0.1.5

I installed the OnlyOffice app and it’s running. But when I try to specify a secret it goes offline with error: 403 Forbidden response: {“message”:“Access denied”} )

I see posts talking about /etc/onlyoffice/documentserver/local.json, but that folder does not exist. I searched for any local.json and none were found on the entire server.