Can’t have a front page on a child theme [closed]

I’ve been developing a child theme for busiprof, and had the very poor sense to update busiprof itself. After the update my front page was mostly gone, only the header and footer are displayed. I’ve tried to remove everything but the css file and it does the same. If I activate busiprof I have a front page, if I activate the (supposedly identical) child theme I only get a header and a footer. I’ve tried to link it to a static page but it still won’t display.

Thanks in advance for any help