After Skyline Collector auto-upgrades to 2.3.0.1 the Collector remains in an inactive state. This is caused by a syntax error in the auto-upgrade script.
This issue is resolved in Skyline Collector version 2.3.0.2.
If you are unable to update to Skyline Collector version 2.3.0.2, restart your Skyline Collector to return it to a Healthy State.