It's as if somehow I've copied part of an old json into my new one. So far that is the only explanation I can figure out as to how this file got messed up. I've corrected all of the tag errors so far except I'm trying to figure out what is meant by a category tag for series errors. I have a category for the series and it refers to a playlists and I have the ID numbers of each series listed in the playlist. Even after fixing all of the other tags and removing a duplicate video it went from 140 errors to 139 so what I did has not fixed the problem so far.
For the date...I updated it as follows. Not sure yet what else is causing the problem but I'll keep digging into it.
I normally copy my last working json and then add videos and save as a different file name. It's been working each week all along. If it's a missing bracket I have not found it yet.
"language": "en-US",
"lastUpdated": "2019-07-10T18:12:32.125Z",