My Multisite Network keeps going down

Hello.

Since I've started using your wonderful new plugin WP Hummingbird I've noticed that my site goes down a lot. Can you see how or why this happens? My entire multisite is build on your guides and plugins.

Right now the network is down, but my main website and customers websites works just fine. But when i go to my domain.com/wp-admin/network/ i get "server error 500"..

Because of this I can't grant access to support, thus to that area of my site being down. What can I do?