Exception while generating vector

After an error-free deployment to ACA, following the [suggested post deployment checks](https://github.com/Azure/Vector-Search-AI-Assistant/blob/main/docs/deployment.md) I found no traces in Application Insights.
In ca-chatservicew-* Container App logs I found many Ks of errors like the following one:
```
fail: BuildYourOwnCopilot.SemanticKernel.Plugins.Memory.VectorMemoryStore[0]
Exception while generating vector for [2574856F-DC91-4D8E-B18D-2253AF2064D9 of type SalesOrder]: This model does not support specifying dimensions.
Status: 400 (model_error)
Content:
{
"error": {
"message": "This model does not support specifying dimensions.",
"type": "invalid_request_error",
"param": null,
"code": null
}
}
```
Examining the CosmosDb there is no sales-order container and *-vector-store containers have no records.

Any hint on what is wrong?