An issue that appears is trying to implement a graphical widget into PB.
The symptom is a blank space.
Example: World Map
[slimstat f=‘widget’ w=‘slim_p6_01’][/slimstat]
Key solution is to ensure that the above shortcode is set to Preformatted style.
Copy and pasting code into a page can result in paragraph style, but for Slimstat shortcode graphical widgets to function correctly in PB I found that Preformatted style works.
Steve, have you tried this in a normal (non-Pressbooks) WordPress environment? Just curious if the behaviour you’re experiencing is a bug with this plugin.