Use the short codes on a separate WP Page or Post. [SLPLUS only_with_category=”category”] The word in quotes is the category slug
P.S Please provide your versions and plugin environment as shown in the posting guidelines. There are changes depending on what versions of the SLP plugin, add-ons, WP and even which version of PHP. All that information is found under your SLP/Info/Plugin environment tab.
The shortcodes information can be found on the docs site