Posts not appearing on home page

Hello, I am having the same problem with the Home Page. Not Found, Sorry, but you are looking for something that isn’t here. All of the links to the other pages are listed and they work but the landing home page makes people think there is nothing there!
Do you know how to fix this? I have tried changing the template and changing it back again and that doesn’t work. It seems like there is a bug in this particular theme.
(Military – Ever Watchful) since the home page works fine when I change the theme.
Any suggestions or help is GREATLY appreciated! Thank you! https://www.patriotsforprosperity.com BTW…not sure what version I’m running and don’t know how to find that out.