Error when trying to connect nodes in prefab edit mode

[Lupos]

I discovered an error when trying to connect nodes in runtime when prefab editor is open.

Code:

[Curvy] Couldn't find Curvy Global Manager. Please raise a bug report.
UnityEngine.Debug:LogError (object)
FluffyUnderware.DevTools.DTLog:LogError (object) (at Assets/Plugins/ToolBuddy/Dependencies/DevTools/Classes/DTUtility.cs:914)
FluffyUnderware.Curvy.CurvyConnection:Create (FluffyUnderware.Curvy.CurvySplineSegment[]) (at Assets/Plugins/ToolBuddy/Assets/Curvy/Scripts/Splines/Connections/CurvyConnection.cs:148)
Lupos.TowerBreak.TowerBreakDefence.Props.Prop.Modules.PropSpline.PropSplineBuilderMb:ApplyConnection (Lupos.TowerBreak.TowerBreakDefence.Props.Prop.Modules.PropSpline.PropSplineNodeGenerator.SplineControlNodeMb) (at Assets/Lupos/TowerBreak/TowerBreakDefence/Scripts/Props/Prop/Modules/PropSpline/PropSplineBuilderMb.cs:181)
Lupos.TowerBreak.TowerBreakDefence.Props.Prop.Modules.PropSpline.PropSplineBuilderMb:ApplyConnections (Lupos.TowerBreak.TowerBreakDefence.Props.Prop.PropMb) (at Assets/Lupos/TowerBreak/TowerBreakDefence/Scripts/Props/Prop/Modules/PropSpline/PropSplineBuilderMb.cs:160)
Lupos.TowerBreak.TowerBreakDefence.Props.Prop.Modules.PropSpline.PropSplineBuilderMb/<>c__DisplayClass25_0:<Build>b__2 () (at Assets/Lupos/TowerBreak/TowerBreakDefence/Scripts/Props/Prop/Modules/PropSpline/PropSplineBuilderMb.cs:138)
Doozy.Runtime.Global.Coroutiner/<DelayExecutionToTheNextFrame>d__15:MoveNext () (at Assets/Doozy/Runtime/Global/Coroutiner.cs:147)
UnityEngine.SetupCoroutine:InvokeMoveNext (System.Collections.IEnumerator,intptr)