404 on Publish/Archive

One of our clients has been having an issue on their site, where if they either archive or publish a blog it will give them a 404 error while doing so but will complete the action just fine. We've as of yet been unable to replicate the issue, but were hoping you might be able to look into it for us with your know-how.

I've included credentials to a copy of the client's site, as well as access to the FTP server.

Let me know if you need anything else!

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