We created a user in Jamf Pro UI and gave it the checkbox next to the API, it seems it still doesn't like/want to sign-in
Looks like you were trying to create a new group in that screenshot above and you've granted incorrect permissions.
You'll need to create a new standard account in jamf and assign it only the following:
Computers — READ
Jamf Pro User Accounts & Groups — READ
Users — READ
Use that new account and fill out the form in the Okta portal.
