According to the error message, Anaplan is unable to locate your " DAT03 Historic Volumes'.Export " So to resolve this issue first of all have a clarity which data-hub you are actually using. Because from your screenshots it seems that you are unsure of the data hub that you have created the 'Export' saved view in. Write your name in square brackets in the suffix of your data-hub name. Then map the data hub, it would be easy for you.
After mapping go to the DAT03 Historic Volumes module in the data hub and check if the historic volumes data and a saved view by the name 'Export' is present or not . If not then import the historic volumes data and rebuild the save view .
Now try to run the action to import the data in the Supply Chain Model.