endpoint creation failed

I am a newbie and I make the tutorial AI ML:

I am using the following command to create an endpoint

# define an online endpoint
endpoint = ManagedOnlineEndpoint(
    name=online_endpoint_name,
    description="this is an online endpoint",
    auth_mode="key",
    tags={
        "training_dataset": "credit_defaults",
    },
)

endpoint = ml_client.online_endpoints.begin_create_or_update(endpoint).result()

But I get error:

HttpResponseError: (BadRequest) The request is invalid. Code: BadRequest Message: The request is invalid. Exception Details: (InferencingClientCallFailed) {

1. Endpoint Name: It is unique it is setup by tutorial
2. Authentication Mode: it is setup by tutorial to 'key' I expect to be ok
3. Model Configuration: I expect to o be ok, since I use a tutorial
4. Resource Availability: I have compute instances, but I don't know the limitations of a free acount
5. Logs and Details: Preiously I had an unregistred resource error. I have fix it by registering Microsoft.PolicyInsights

Can anyone help me ? It is a setup issue ? I performed all the command from depoy-model.ipynb