How can I get rid of the "Failed import for ObjectProperty" warning?

This seems related to a delegate calling a blueprint function library/blueprint macro library (especially, which involves a pure cast of an item) directly, from an event graph or similar area on a blueprint. These must be “checked” on editor open and fired just like the event tick on the anim BP is always running in the background, in realtime, when an ABP is opened. It must be a false positive, as it has never actually caused me an obvious issue related to those “unloaded” objects.