Hello Jean,
Looks like your theme doesn’t support this plugin, better to move with some other.
Hi that makes no sense if it does not support the plugin why does it display it.
My question is actually how and exactly where do I insert the code above to solve the problem.
Relate with layout/struct of your website => you have to do/change in your theme. I just provide function/shortcode/widget to get data.
With sidebar, provide some widgets here: http://prntscr.com/rvzd29
Hope help you and thanks @ponvendhan once.