From SteamCommunity:
Exception in UIRootUpdate: System.InvalidCastException: Cannot cast from source type to destination type.
at MizuMod.PlaceWorker_WaterNet.AllowsPlacing (Verse.BuildableDef,Verse.IntVec3,Verse.Rot4,Verse.Map,Verse.Thing) <0x00481>
at (wrapper dynamic-method) RimWorld.GenConstruct.CanPlaceBlueprintAt_Patch1 (Verse.BuildableDef,Verse.IntVec3,Verse.Rot4,Verse.Map,bool,Verse.Thing) <0x01867>
at (wrapper dynamic-method) RimWorld.Designator_Build.CanDesignateCell_Patch2 (object,Verse.IntVec3) <0x000ac>
at RimWorld.Designator_Place.SelectedUpdate () <0x0016f>
at RimWorld.Designator_Build.SelectedUpdate () <0x0001c>
at Verse.DesignatorManager.DesignatorManagerUpdate () <0x0005d>
at (wrapper dynamic-method) RimWorld.MapInterface.MapInterfaceUpdate_Patch1 (object) <0x000b2>
at RimWorld.UIRoot_Play.UIRootUpdate () <0x0007a>
From SteamCommunity: Exception in UIRootUpdate: System.InvalidCastException: Cannot cast from source type to destination type. at MizuMod.PlaceWorker_WaterNet.AllowsPlacing (Verse.BuildableDef,Verse.IntVec3,Verse.Rot4,Verse.Map,Verse.Thing) <0x00481> at (wrapper dynamic-method) RimWorld.GenConstruct.CanPlaceBlueprintAt_Patch1 (Verse.BuildableDef,Verse.IntVec3,Verse.Rot4,Verse.Map,bool,Verse.Thing) <0x01867> at (wrapper dynamic-method) RimWorld.Designator_Build.CanDesignateCell_Patch2 (object,Verse.IntVec3) <0x000ac> at RimWorld.Designator_Place.SelectedUpdate () <0x0016f> at RimWorld.Designator_Build.SelectedUpdate () <0x0001c> at Verse.DesignatorManager.DesignatorManagerUpdate () <0x0005d> at (wrapper dynamic-method) RimWorld.MapInterface.MapInterfaceUpdate_Patch1 (object) <0x000b2> at RimWorld.UIRoot_Play.UIRootUpdate () <0x0007a>
Verse.Log:Error(String, Boolean) RimWorld.UIRoot_Play:UIRootUpdate() Verse.Root:Update_Patch1(Object) Verse.Root_Play:Update()