what exactly is not working with the update? Do you get an error message?
Sidebar: The shortcode you used is a grid shortcode, you can choose between 2,3 and 4 columns, you can see this also in the theme documentation. You can try to reduce the shortcode from 3 to 2 columns, maybe then it’s better.
Slider: We checked your page, but cannot see a problem with the slider. We tried already chrome, firefox and mobile devices, but on our end all is working without any problem. What exactly is not working??