Yes, record a video. Are you using it for RPG Maker MV? Did you change anything in the plugin? This plugin works well for everyone else. Also, could you take a screenshot from the debug window by pressing F8 during gameplay? Can you try putting the plugin at the very top and very bottom of the plugin list and see if that helps? I have added +100% critical and it worked in giving me a turn.
Edit: also, can you take a screenshot of your plugin manager? Are you using any other battle system plugins simultaneously? You really shouldn't.