Ran into this with Centerville. If someone tells one note to index the retail pro directory it throws a onenote TOC error. Fix is to search for onenote in the retail pro directory adn delete all TOC files from within the retail pro directory.
This only seems to happen on computers where OneNote is not installed or partially installed because it can’t read teh TOC files properly.
Make sure to show system and hidden files or search won’t find the files.