I understand that many people don’t want to expose their domain names but there are way too many variables starting with the domain name registration. I’ve had people tell me of their chosen domain name to find they misspelled it, plan to buy it in the future, and/or it’s not available for one of many reasons.
I’ve had them tell me WordPress keeps answering with a 404 error no matter what they do just to discover the error page is some custom page their host, their control panel, their CDN, or else their Proxy service gives out in lieu of a proper error page.
I did look over the details you gave but that’s a poor second to watching a ‘success or failure’ on my own screen when I look on my own system. So read the many answers already offered for this subject across the Web and including this forum. Read the multitude of documents already available. If you can’t then figure it out ask again but give all the details you can give.
In your case, it may also be a cache issue… quick way to find out is to go to another PC, laptop, or notebook even and type in the domain… that’s exactly what I would have done from here if I’d been given your domain name… and I’d probably have drilled down further into the issue if that would not have worked.
Please also remember that the WordPress moderation team doesn’t redact domain information on their forums after the fact… If you really don’t want to expose your domain names publically then hire someone who can (WILL) sign an NDA or won’t expose your information unnecessarily.
PS. If you really need my attention specifically then Quora gives me a bit more options up to and including personal contact via email or phone even. https://www.quora.com/profile/Jeff-Hawkins-1