PAC CLI Service Principal Permission Error When Running pac admin list / pac admin backup

[akashombase7]

My goal is to take a backup of a Power Apps / Dataverse environment using PAC CLI, but I am receiving a permission error related to the Service Principal and tenant access.

I believe all required permissions have been assigned, including System Administrator inside the environment (screenshot included), but the PAC CLI still fails.

[admin@vsgrholpscb02 ~]$ pac admin list
Connected as b9b0bef5-81f4-435a-af48-4c215eefa43e

Listing all environments from your tenant...
** Message: 12:10:01.571: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
** Message: 12:10:01.606: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
Microsoft PowerPlatform CLI
Version: 2.1.1+gefbf518 (.NET 10.0.2)
Online documentation: https://aka.ms/PowerPlatformCLI
Feedback, Suggestions, Issues: https://github.com/microsoft/powerplatform-build-tools/discussions

Error: The service principal with id 'aeebc187-463a-47c6-bb73-7eb859beb5e8' for application b9b0bef5-81f4-435a-af48-4c215eefa43e does not have permission to access the path 'https://10.0.8.23:20260/providers/Microsoft.BusinessAppPlatform/scopes/admin/environments?`$expand=permissions&api-version=2020-08-01' in tenant 7007305e-2664-4e6b-b9a4-c4d5ccfd1524.

The service principal with id 'aeebc187-463a-47c6-bb73-7eb859beb5e8' for application b9b0bef5-81f4-435a-af48-4c215eefa43e does not have permission to access the path 'https://10.0.8.23:20260/providers/Microsoft.BusinessAppPlatform/scopes/admin/environments?`$expand=permissions&api-version=2020-08-01' in tenant 7007305e-2664-4e6b-b9a4-c4d5ccfd1524.

What I Have Already Verified
✔ Environment-level permissions
The Service Principal already has the System Administrator role assigned within the Dataverse environment (screenshot attached).
✔ Successful login
PAC CLI logs in successfully using the application ID.
❗ Still receiving access/permission errors
Even though environment permissions are correct, the admin APIs in PAC CLI cannot be accessed.

❓ Help Requested
What additional tenant-level or Azure AD permissions are required for a Service Principal to successfully execute:

pac admin list
pac admin backup