Issues with Sitebuilder: Can't Update Content or Select Type

Hello to Everyone I have big problems using the sitebuilder. ic cant update the content. cant select the type. when i click in the tep left area of the section i can activate a "div" where in some contet is moved an can be editet. Try several stuff: updating chrome, refreshing chrome, restart mac, is it a bug? can somebode help me?