UPDATE: The fix for this issue was released in the August 17, 2018 update.
On the Fees and Fines page and the District Assets Fees page, the fee letter type dropdown is not displaying for non-admin users when clicking on the "Print Fee Letter" button. The dropdown box does appear correctly to Admin type users, but standard users will not see a dropdown as they should. Note: the report prints fine when navigating to the report page itself.
Programming is working on a fix for this issue now.