Jetpack Gallery Widget not working with PageBuilder

Hi to everyone.

I am using the Intro theme with wordpress 4.3.1. and Jetpack 3.7.

When I try to add a gallery (jetpack) on my front page using the PageBuilder the button “choose images” doesn’t work. Noting happens. I tried different browsers, same result.

When I go to the widget section and add the gallery to my sidebar everything works fine.

I can’t figure out why it won’t work on the frontpage

Can someone help? Thank you