Sorry for choosing WPMU DEV Dashboard, but it doesn't give me a choice for Membership Pro 2....
The issue is with Membership Pro 2. I tried installing it Network wide and it caused a server 500 error for the network and subsites. I then disabled it and tired it on just the site but same things. The second time I had to rename the plugin though ftp and managed to get it back.
I just created a full site backup and was hoping to get Membership Pro 2 to work. I'm hosting on Siteground. Anything to look at is a plus.