Missing Role with Saml AuthN to OpenSearch Domain

Security
1

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
2.3

Describe the issue:
I made an OpenSearch domain in Aws. I have an endpoint to the OS Dashboards page, but when I click it, I get this error:

Missing Role
No roles available for this user, please contact your system administrator.

We are using Okta for Saml authN to the site. I would like to know how I can use my master user (Iam User) to make it so that every one who passes the Okta authN is able to use the site as an admin. How can I do this?

Thanks

Configuration:

Relevant Logs or Screenshots:

2

@vstevenson Just to be clear, you’d like your users to log in as admin to OpenSearch Dashboards using Okta SAML. Is that correct?