[Membership 2 Pro] Membership 2 Pro update crashes site

The update to Membership 2 Pro is crashing my site! The site in question is:

https://academy.houndstoothmediagroup.com

The back end of the site seems fine after updating, but the front end only shows a blank white page.

I pushed the site to staging to try troubleshooting (http://hmgacademy.staging.wpengine.com) - I updated Membership 2 and deactivated all plugins so that I could check for conflicts, and even with *all* plugins deactivated (including Membership 2) I still only get a blank white screen on the front end of the site.

Help!

I have turned on support access for both the live & staging versions of the site. Thanks!