After a few hours of failing to connect, it finally connected and has been holding the connection. Not sure what happened but it seems the ER605 just needed some time.

I logged into my controller today and noticed that my controller and all of my devices had new versions to install. Everything seemed to be upgrading fine until my ER605 router updated, when it came...

Devices: Controller OC200v1 Router ER605 v2.0 Switches TL-SG2008P v1.0 and TL-SG2210MP v3.0 Access point EAP650(US) v1.0 After logging into my controller tonight I got a notice to update to version...