I’m using my own theme to match my website’s design.
I don’t know why, but 4.2.2 has fixed it for me.
I also found out in 4.2.1 that if I avoided certain characters, I could save, update, preview and publish. Characters such as accents on letters, the opening and closing apostrophes instead of “, the inclined colon instead of the normal one ‘.
I don’t know why though…