Error 404 when submitting ODK completed survey forms to google sheets

Welcome to the ODK forum, @Docum! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!

Have you seen this video tutorial: https://www.youtube.com/watch?v=GnXwGmhaI9U

And have you looked at the documentation on connecting Collect to Google?

I think you need to create a new Google Sheet file for the new version of the survey form. Also, please check the format of the URL you are using for submission and check your sharing/editing permissions on the Google Sheet.