JS object broken
I've just gone to try and learn some max javascript, and realised that all js objects are broken now. (newobj js: No such object). Even the ones in the help files like the js help examples for buffer~. All js objects show as red boxes.
Last thing I was doing was playing with the file paths in the max settings. (added some extra sample folders to my premapped paths)
highly likely you've added some file to your search path named js. If you are unable to locate it then I would try a preference reset