Error log tells me since today morning as below.
It is not possible to use simply storage objects and they were gone although i was using saves from yesterday night when it worked perfectly fine.
What's the reason of this??

Could not load reference to Verse.ThingDef named JDS_Wooden_Crate
Verse.Log:Error(String, Boolean)
Verse.ScribeExtractor:DefFromNode(XmlNode)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
Verse.GenGeneric:InvokeStaticGenericMethod(Type, Type, String, Object[])
Verse.ScribeExtractor:DefFromNodeUnsafe(XmlNode)
Verse.Scribe_Collections:Look(List`1&, Boolean, String, LookMode, Object[])
Verse.Scribe_Collections:Look(HashSet`1&, Boolean, String, LookMode)
Verse.Scribe_Collections:Look(HashSet`1&, String, LookMode)
Verse.ThingFilter:ExposeData()
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Deep:Look(ThingFilter&, Boolean, String, Object[])
Verse.Scribe_Deep:Look(ThingFilter&, String, Object[])
RimWorld.StorageSettings:DMD<DMD<ExposeData_Patch1>?-1957708288::ExposeData_Patch1>(StorageSettings)
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Deep:Look(StorageSettings&, Boolean, String, Object[])
Verse.Scribe_Deep:Look(StorageSettings&, String, Object[])
RimWorld.Zone_Stockpile:ExposeData()
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Collections:Look(List`1&, Boolean, String, LookMode, Object[])
Verse.Scribe_Collections:Look(List`1&, String, LookMode, Object[])
Verse.ZoneManager:ExposeData()
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Deep:Look(ZoneManager&, Boolean, String, Object[])
Verse.Scribe_Deep:Look(ZoneManager&, String, Object[])
Verse.Map:ExposeComponents()
Verse.Map:DMD<DMD<ExposeData_Patch1>?-84240128::ExposeData_Patch1>(Map)
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Collections:Look(List`1&, Boolean, String, LookMode, Object[])
Verse.Scribe_Collections:Look(List`1&, String, LookMode, Object[])
Verse.Game:DMD<DMD<LoadGame_Patch2>?652571904::LoadGame_Patch2>(Game)
Verse.SavedGameLoaderNow:DMD<DMD<LoadGameFromSaveFileNow_Patch1>?-835779840::LoadGameFromSaveFileNow_Patch1>(String)
Verse.<>c:<Start>b__1_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()