When a local power user (No AD or SAML) logs on to TC and wants to access the Metric Browser the user is unable to view metric data, instead "An error occurred while loading the metric data" is reported. All the other items in TC are accessible. As a power user, I am also not authorized to the metrics. As a tenant admin, I can see them.
1/ tenant admin without any universe
2/ power user without any universe
This is because by design the User/Power User with no permission to any Universe, should not see any Agents/Metrics in Metric View. The User with the read permission to a Universe should see Universe configured Agent metrics in Metric View.
Release : 20.2 & 21.3 on-prem
The User with Edit permission to a Universe can see Universe configured Agent metrics in Metric View. After creating a new test universe and assigning read or write permission to this universe for my power user I am able to see the metrics.
3/ power user with read or write permission to a universe
AIOPs - Troubleshooting, Common Issues and Best Practices