hmmm.
Nature of the Wild Lands says nothing about SSE version, SKSE isnt even required, says nothing about DLL's, and only says "use DynDOLOD to make LOD's for this", doesn't specify a version.
This specific plugin is a patch between NotWL and Interesting NPCs. 3DNPCs loads before this, so if that were the issue, it would have thrown the error for 0A, if our assumption about the plugin code is correct.