Assign the oauth_user role to the ServiceNow admin Account
Perform these steps in your ServiceNow IT Service Management portal. Make sure your account has the ais_high_security_admin role and the application scope is set to Global.
1.) Navigate to All>User Administration>Users.
2.) Search for the User ID of the admin account and click on it.
3.) Click on the Roles tab.
4.) Click Edit.
5.) Under Collection search for the role oauth_user, select it, and click > to move it to the Roles List.
6.) Click Save.