It looks like the way you named and setup your relationships caused some issues.
Your relationship to Report is called “CreateExpenseReport” , consider renaming this so simply “Report” instead. (see screenshots)
Similarly, your relationship to Expense should most likely be named “Expense” or “Expenses” for clarity.
Once you have clearly named relationships, make sure to check their mapping in the transformation.
Tip: “Involves one” relationship become an attribute you need to map - the attribute is the name you gave to the relationship. “Involves many” relationships require an extra transformation under the Relationships folder.
We hope this helps. Make sure to open a ticket directly with the Academy if issues persist. Thank you!