I saw there are already some topics on that, but either they have a different problem or no solution has been provided yet.
So my problem is that the slider is not working, although I have created some posts and put a featured image, assigned them to a category and chose that category in the slider settings - so please don’t reply “make sure you have chosen a category or make sure you have put a featured image” - i’ve done that.
Could you please share the site URL where it’s not displaying correctly so that i can troubleshoot it?
This can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.