Hi, I have similar issues after updating PB (I was already on WP 3.8 and everything was working fine, so it can't be WP3.8) , some of which I could solve:
1. The button widget (solved): after downloading the Pagebuilder Legacy Widgets plugin, my simple buttons (=origin) were not showing anymore, except as a hyperlink. I uninstalled the Pagebuilder Legacy Widgets plugin, back to using the old PB Button widget, and the buttons are all showing fine again.
2. Embed Video (solved): I had to re-input the links of the vids, but they are all showing fine again.
3.3. Page content: serious issues still after updating PB. Will open a seperate ticket for this.