Dive Page Builder

Hello I am Raymond,
i have installed the Dive Thema and its been succesfuly installed but i got problem when iam trying to add page where i could not find the page builder appear there to drag and drop edit the pages. recently i have installed the recommended thema : The BuddyPress Thema Version 2.7.4 . but i dont know whats going on and i can not build my page using page builder.

any solution with this issue?
looking foward to hear from you.

Cheers
Ray.