Looks like the endpoint needs to be granted permissions before running "Invoke Model" step in Deployment action:

Error:
Run az ml online-endpoint invoke --name web-classification-0e1890 --request-file promptflow/deployment/sample-request.json -g *** -w ***
Class WorkspaceHubOperations: This is an experimental class, and may change at any time. Please see https://aka.ms/azuremlexperimental for more information.
ERROR: (UserError) Access denied to list workspace secret due to invalid authentication. Please assign RBAC role 'AzureML Data Scientist' to the endpoint for current workspace, and wait for a few minutes to make sure the new role takes effect. More details can be found in https://aka.ms/pf-runtime.
Code: UserError
Message: Access denied to list workspace secret due to invalid authentication. Please assign RBAC role 'AzureML Data Scientist' to the endpoint for current workspace, and wait for a few minutes to make sure the new role takes effect. More details can be found in https://aka.ms/pf-runtime.