Script Expression stopped working after upgrading to April 2018 Release.
After upgrading to the April Release some Script Expressions started to failed. And affected devices are not updating.
Scripts gives throws exception:
Method not found: 'Jint.JintEngine Extender`1.get_Engine()'
The April Release features a new faster scripting engine.
Upgrade all plugins and your scripts will start working again. Use the "Update All" button.
Read more about the new scripting engine here.