The Move Directly Toward task does not seem to be working without a Nav Mesh in the level. Based on the tooltip "moves directly to the target without regard to any navigation system", it is expected that it would move without a Nav Mesh being present.
Found in 4.11.2 binary. Reproduced in 4.10.4 and 4.12 Preview 4 binaries.
1. Open the attached project (this is the 4.12 version)
2. PIE (Notice that the cube does not move)
3. Add a Nav Mesh Bounds Volume that covers the level
Result: The cube now begins to move.
Expected: The cube would move without regards to navigation as it states on the tooltip for the node.
Head over to the existing AnswerHub thread and let us know what's up.