Booster / Portlets

Hello. I added a navigation portlet on the left column in my booster theme, but he doesn't appear on mobile version (under 768px)... How could I fix this?

Please, I have to show my website to a jury thursday, it's an emergency... That's the only problem on my website...

what do you mean by 'added a navigation portlet on the left column' ? there is already one enabled by default so there is no need to add another one.

I installed the plonetheme.booster theme on a 5.1.2 test site and the navigation portlet seems to displays fine (when the browser is set to adaptative mode it displays first instead of left but it's supposed to work like that)