Whenever I give a map nodes and go through the whole procedure of making the .txt an .ain, then moving it to garrysmod/maps/graphs, the map cannot be played properly anymore. I show up as a standard "gray gordon" playermodel, and when I die, the game crashes.

This occurs on all workshop-downloaded maps with no built-in nodes.

EDIT: Just to test and see if it still failed, placing 4 nodes on gm_peachs_castle_realistic and installing the nodegraph did NOT cause any issues. NPCS can use the 4 nodes just fine, as well. Will fully node that map and test again.
EDIT 2: It works. I don't know if it's just a specific map or some sort of addon conflict.