There is no project with name “Blueprint Office” either in the Learn section or on the Marketplace.
*There is a project in the Learn section called “Build a Detective’s Office Game Environment” it is perfect for version 4.24 or higher. I took course on 29/11/2020 on a later version of the engine and did not notice any critical errors.
(on the portal Unreal Online Learning) Build a Detective’s Office Game Environment
(on the Marketplace) Build a Detective’s Office Game Environment