I deployed Prompt Flow, and I got an error "failed with status 502" when I tested endpoint.

### Operating System

Windows

### Version Information

azure-ai-ml 1.9.0

### Steps to reproduce

1. Created prompt flow
2. Added two chains to the prompt flow.
3. Deployed prompt flow
4. Assigned AzureML Data Scientist role to Workspace.
5. Tested endpoint

### Expected behavior

I wanted to test deployed endpoint.

### Actual behavior

Failed to test endpoint.
{"error":{"code":"SystemError","message":"Open url /subscriptions//resourcegroups//providers/Microsoft.MachineLearningServices/workspaces/firstworkspace/connections/secrets/listsecrets?api-version=2023-04-01-preview failed with status code: 502, action: listsecrets, reason: { \"error\": { \"code\": \"UserError\", \"severity\": null, \"message\": \"Identity(object id: a14e3d"}}

### Addition information

_No response_

No repository file or test is identified in the report. Start by reproducing the Windows deployment and endpoint test with azure-ai-ml 1.9.0, then investigate the 502 response from the listsecrets action and the assigned workspace role; done means the deployed endpoint can be tested successfully.

Written by the indexing model from the issue text.