I’m also having this problem, but I have no single.php file in my theme. I’m seeing my blog in the preview pane as it should look, but instead of my saved post, it says, “Sorry, no posts matched your criteria.” Once it is published, I can see it when modifying the post.
I reinstalled WP twice, no change.
Now, I don’t know much of anything about php, so I took the single.php file from the default theme, copied into mine, uploaded it, but that only made it worse.
I don’t use categories in this blog – everything goes into General.
Any ideas/suggestions? ??
Thanks much!