I tried to run it with the "Sort" button in MO2 instead of the "Run".
This time, an error message about a mod cycling problem appears.
Dragon Shout with Voice. I tried to run it to Creation Kit after the installation to have the voice from the right direction like explained in the guide but it seems that I mess up something.
So I have erase the mod and download and installed again and now LOOT is working fine.