Posts not being found through links

Hi,
I have created a blog website about food. I only let it go live yesterday and since I have had quite a serious problem. Sometime within the last 12 hours for some reason non of the links to open each new post won’t work, it comes up with ‘oops!that page can’t be found’ This is really odd as it was all working perfectly. Please feel free to come and see the problem by using the link below. I am very new to this and would really appreciate all of the help I can get.
Thanks

https://www.benscocina.com