If you got that error it means you updated the XStore core plugin but did not update theme. Before every core plugin update we would recommend you to check the changelog https://xstore.8theme.com/update-history/ and you’ll find that you need to update not just XStore core plugin but XStore theme first. Any core plugin update requires theme update to the latest version before the plugin update.
So, update your theme to version 5.6 first and after that proceed with the XStore core plugin update. After that clear plugin and browser cache. If you have any issues with sliders after the theme and plugin update provide screenshots or video, tell me what device you use. Because we did not see any issues using our mobile devices.
