Null Reference Exeption on launch

In version 1.6.1 running on KSP 1.0.5 I get the error "[Exception]: NullReferenceException: Object reference not set to an instance of an object" when the loading reaches KSPI_Extended/WarpPlugin/Parts/Engines/KANDL/KANDL/kspiNuclearCandle.
Attempted to removing the KANDL folder only to have the same error on the next folder down in ~/Engines.

Installed Modlist:
KSP: 1.0.5 (Unix) - Unity: 4.6.4f1 - OS: Mac OS X 10.10.5
Filter Extensions - 2.4.1.3
KSP-AVC Plugin - 1.1.5
Community Resource Pack - 0.4.7
Interstellar Fuel Switch - 1.18
KSP Interstellar Extended - 1.6.1
Kerbal Engineer Redux - 1.0.18
RCS Build Aid - 0.7.4
RCS Sounds - 4.4
Kerbal Alarm Clock - 3.5
TweakScale - 2.2.5

Full error message:
[EXC 21:05:57.010] NullReferenceException: Object reference not set to an instance of an object
ModuleEngines.SetupPropellant ()
ModuleEngines.OnLoad (.ConfigNode node)
PartModule.Load (.ConfigNode node)
Part.AddModule (.ConfigNode node)
PartLoader.ParsePart (.UrlConfig urlConfig, .ConfigNode node)
PartLoader+.MoveNext ()
[EXC 21:05:57.016] NullReferenceException: Object reference not set to an instance of an object
PartLoader.GetDatabaseConfig (.Part p)
PartLoader.GetDatabaseConfig (.Part p, System.String nodeName)
DragCubeSystem.LoadDragCubes (.Part p)
Part+.MoveNext ()