Manage bulk categories admin panel not working 1.7.7

[Presta_lover]

Hi,

i am having a really strange issue with prestashop.

In admin panel, when I try to click on check boxes from categories to delete in bulk any of them, the back office send me in of this category.

I mean, I CAN NOT check many checks because is like a wanted to go inside this category, nor just use the check box to leave it marked up.

 

By the way, my version is 1.7.7.0, I didn't saw it in beta versions...

 

PD: I am quite newbe in prestashop!

 

Thanks a lot, everyone