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Looks like you were able to resolve the issue? I see the last form submission for the form named jvnotify was on November 5th. I also tried making a test submission and see that was received. I was also unable to reproduce a 404 error.
Thanks for the follow-up. Unfortunately, I wasn’t able to reproduce the issue when originally responding to this post. I also haven’t seen similar issues during that time period, so I’m also not sure why it happened.