Try deleting the AI commander and the objective modules and replace them (being sure to set them to place units). I'm not sure how critical it is but make sure to place them on top of the literal object; meaning, if it's a civ obj module make sure to place it on the exact civilian object (be it a building, etc). This has happened to me a bit lately too.

Also, just for the sake of testing this,use the "Do Not Filter" options within the modules.

And, if that fails, move the civ/mil obj modules to a different location on the map.