My home page doesn't show the content – Theme Mystile (WOOthemes)

hello !
I’ve got a problem with my theme : Mystile
it doesn’t show anything except the menu in my home page.
it is supposed to show an image slider, some text and a widget from woocommerce showing the lastest products.

These informations are correctly written in the page “home”.
The problem is coming from the code in “functions.php” (i think so), as I tried earlier to add a line of code in functions.php.
that was a mistake, it took my home page down. So I copy and past in “functions.php” an old version of my website which was working.

This is the adress of my website : https://www.lesbonnesbases.ch

Can somebody else ?
I tried everything I could for the last hours but I really don’t see how to solve this.