The last couple of days, when I am finishing up a draft post and hit "Preview a post" I get the error message "Sorry, no post matches this criteria." This has also happened in the past. It seems that the "Preview a post" feature is somewhat unstable - working some weeks and not working other weeks. Is there something I could be doing wrong? I'm just confused because I don't think I'm doing anything differently from week to week.
And to be clear, these are draft posts that are not showing up...not published posts.