Hello, 

Our organization already has a production instance of Rock running in AWS, but I am trying to set up a (mostly) free-tier test instance. I've been able to get through most of the app deployment up to the point that I get the "Success - Flip the Switch" screen, so I can see all the files in wwwroot and all the db objects in MSSQL that are created in the installation process, but when I click "Flip the Switch" I eventually get an error saying "That Wasn't Supposed to Happen..." and I still can't access the external site or the internal login page. I double checked all the settings outlined in the "Rock Solid Internal Hosting" document so I don't know if it's the RDS instance type or the version of SQL Server I'm attempting to use or what. Does anyone have any ideas what the issue may be? 

I'm using a t2.micro EC2 instance and a db.t3.micro RDS instance running SQL Server Express edition w/ engine version 15.00.4365.2.v1. 

Thanks for your help!