• I’ve had this error in my admin and I fixed it by replacint line 4 of the file with:

    if(isset($_POST['rt_reading_time_hidden']) && $_POST['rt_reading_time_hidden'] == 'Y') {

    Also there is a typo on line 58. It says “<p>Want to insert the reading time into your theme? Use do_shortcode(‘[rt_reading_rtime]’)</p>”. Change that to “<p>Want to insert the reading time into your theme? Use do_shortcode(‘[rt_reading_rtime]’)</p>” (there is an extra “r” in the shortcode).

    Good luck.

    https://wordpress.org/plugins/reading-time-wp/

  • The topic ‘Undefined index: rt_reading_time_hidden in rt-reading-time-admin.php on line 4’ is closed to new replies.