Wordpress installation failed

Hi.

It seems that the currently set theme is called divi, and according to the tutorial, it should be called MDB Blog (unless you followed a different tutorial than I think). Have you given a different name to the theme? Maybe you don't have the right theme currently set? Was the custom.unified.js file created by you?

Thank you for you answer Grzegorz.Indeed, i did not followed the wordpress tutorial in its entirety. I already have a theme named Divi and i just needed to integrate mdb component.

The error messages in my previous post seem to be linked to Divi, so do not consider them anymore ;)

The issue i'm now facing is "$ is not a function" as you can see on this new capture :

My functions.php :

I specify that the error message appears since i try to add datatables components.

Is this error due to no-conflict-jquery wordpress use ?I'm actually using default jquery installed in wordpress.

Thank you !