In Analytics, for each Data Feed, Data Source and Datamart there should be a couple of Data Loads created automatically. If any of those are missing, try the following solutions.
Deploying (or re-deploying) the Data Source or Datamart should create the default Data Loads. If this does not help, try Solution 2.
If the missing Data Loads are related to the default Data Sources and Data Feeds (Currencies, Calendar, Customer, Product, UOM etc.), ask Support to run a system redeploy command for you.