All 404 Pages Are Redirecting To Home Page

Hi All!

First of all, I have created many WordPress sites but never have encountered this issue.
As the title says, any kind of 404 URL is redirecting me back to the homepage, which it should not.

I tried: Disabling All Plugins and Themes, but no luck.
Safe Mode, no luck.
– Also this is a fresh multisite wordpress install.

So anything like /404/ is redirecting me to
You can test the URL above given (Hidden and please keep it hidden 🙂

The page I need help with: [log in to see the link]

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