If you are missing one or more predictions once your Predict App or Enrichment has been processed it is most likely that one or more of the fields selected to have a prediction on is missing data.
For example, if a prediction is to be made on the embedding generated from field1, field2 and field5 in a datasource but field 2 for one row is empty then no Prediction will be empty as well, it is not generated based on the available data.