Not displaying extended posts

Hi,

For about a week now, my website https://www.fashezine.com doesn’t see to be working properly, and now it stopped working at all. More specifically, I can see the home page just fine, but when I click on a post (to expand and read it) I get a NOTHING FOUND message, or it just reopens the home page, yet the link in the address box is the link for the article, not for home. I would really appreciate any help with this, because I can’t figure out if it’s wordpress, the theme, or me who’s doing something wrong, but I have to fix it soon.

P.S. If I do log in first and them attempt to see the post it works just find, but for everyone else it’s as I described above.

Thank you!