Is there a way for the Console to show me exactly which I need to fix?
Not really - or to be precise not without a good basic in programming knowledge.
You would have to follow the trace to get to the original cause of the error - which is problematic because the console only says that it is part of an event (Control variable script error, which means that it is in a control variable command, and using a script line option in that command).
If you can find that event and give a screenshot of its event page with that command based on when the error happens, then you have a chance of finding this case - but it will not be easy.
And that is why you should never mass-edit json files, only edit single cases where you know what they're used for...
EDIT: A much better solution would be if you made a backup before the changes and use that again, this time only editing what you know to be a text and leaving the function versions alone.
But I'm guessing you didn't make such a backup before changing, or you wouldn't be here with this problem...