Space out not Showing in Main menu

You might be using Offline Mode, which unfortunately is a limitation of the Epic Games client. See this thread for more info.

No off line mode is not checked on the Epic Launcher

Windows Defender or other security software may be blocking the game's ability to communicate with Epic's servers. Open your start menu and type "allow an app through Windows Firewall" then press enter. Look for oxygennotincluded and make sure Public is checked. 

I tried that.  The Oxygen not Included was not part of the Windows Firewall so I added it.  Still not loading when you click on the shortcut for the Epic Launcher desktop shortcut or within the Epic Game Launcher.  The only way I can get into the game is to go into file explorer where ONI is stored and on the oxygennotincluded.exe Right-Click and run as administrator.  And it still comes up vanilla

When you visit https://api.epicgames.dev/sdk/v1/default?platformId=WIN what do you see?

This is what I get

So you'll need to figure out what's causing the certificate error, the same thing is stopping epic from talking to their servers. Some possible causes are an ISP hijacking the DNS for like a login page or something, a virus trying to steal your credentials, or an out of date OS without the latest certificates. Try opening the certificate details, that should provide clues as to which it is. It's in the red triangle that says not secure next to the URL bar.

At the end of it all it, wasn't my router but my Cable Modem needed to be reset and then restarted everything and now it works now.  It would seem that the ISP had updated my IP address for some odd reason.  The only way I was able to find it was when I did a Ping Ports and it was different than what my IPconfig was showing me.  I hope this helps others