Character "Move To Location or Actor" not working

As a RTS game, I want to order the units to move to whatever location I right-click to. But for whatever reason the unit are not reacting to my commands (it worked earlier in the project).

The Character blueprint uses DetourCrowdAIController, has Auto Possess AI as Placed in World or Spawned, and I have a NavMeshBounds in place (all green when P). The location is ok, but the “Move To Location or Actor” node always fails.

All help is welcome.

The Game Controller right click action:

The Character class function to move the soldier:

Following this tutorial series: RTS Game - Multiplayer Setup (4 Players) & Player Starting Camps - YouTube
with a few personnal additions.