Image button is not working architectos theme

Hello,

I am using architectos theme.

On of the particularities of this theme is that you can put an image as background or attach images to a portfolio ítem (not a page or a post).

I have being working during a lot of days, but now, the button of uploading images is not working!!!! When you presh, it reloads the same edition page and go to the upper part again…

NOte: I can upload images inside a post, or as featured image of an ítem.

Thanks in advance,