Debugging

A few things you can try:

  1. Network disable all plugins other than Pressbooks to see if the problem persists.
  2. Switch your book to the “McLuhan” book theme (the Pressbooks default) to see if the problem persists.
  3. Add this line to wp-config.php: define( 'WP_ENV', 'development' ); to enable some extra debugging features.

Other helpful tools: