All elements are disable on a page without doing anything

Hi !

I have a glitch since few days on one particular page. All elements (header, footer, etc..) are disables even though I didn't check theses cases in the add-on.
All of my other pages works perfectly.
I checked my css if there was something like display: none, but it's not the case.
I also tried to integrate this css in my page :
.footer-widgets {
display: block !important;
}
but again it's not working.

What could it be ?

Thank you for your answer !