Upon removing the 2D adventure game from the project (as I can look back on it with a fresh toolkit project and it simply takes up space in my project), it became clear that a few assets within are referenced in the base toolkit. The SM_Arrow_Flat mesh, referenced by the grid manager needs the M_Arrow material and Arrow texture from the 2D game. They should be moved to the toolkit so that the 2D game is indeed a true child of the game and therefore not needed. I already made the necessary changes for the project on my end by adding the needed texture and material to their respective folders and changing the material reference in SM_Arrow_Flat mesh, but just letting you know about it, in case you didn’t know.