BuddyPress.org

I’ve got Woocommerce, Shop Isle Theme and a vew assorted plugins including bbpress and buddypress.

Everything works great until I try to install ANY plugin involving newsletter features. Then I get an error that’s ONLY in the WP Admin area, usually involving running out of memory (even though my limits are nearly maxxed out).

So installing the following ALL break just the backend:
Mailpoet
Newsletter
Icegram
MailChimp

These things were all playing together nicely until the most recent update to Buddypress, now all of it breaks every time I’ve got the following switched on:
Woocommerce
ANY of the Newsletters above
bbpress
Buddypress

Can anyone advise on what I can do? Or is there a way to roll back to the previous version before everything started breaking?

Cheers.