Boxes of the right panel always unchecked.

Hello all,

I’m gonna turn crazy ??
The plugin worked very well for 3 days.

And suddenly, it disappeared from my home page.
It has to appear at the bottom of this page, under the sentence “Le design, c’est chouette.
Surtout lorsqu’il a un sens.”
https://datavista.fr

What I did before ? I just removed some pictures of the slider in the back office of WordPress…

And when I registered my slider to update it, it disappear from my home page and all the boxes of the right panel turned unchecked…???

Now, the “options pour les développeurs” on the right panel (“Imprimer CSS” / “Imprimer JS” / “Mode sans conflit”) don’t want to be stay checked anymore. When I leave the plugin admin to go on another page of my admin website, it always return on unchecked mode… And I think this is the reason of the problem.

Do you have an idea of this trouble ?
Thanks a lot !