This log shows up in yellow,
im just curious as to what it means,
im presuming that yellow errors are still use-able / playable
where as ofcourse the redliners are major issues

-----(Debug error log title)-----
Tried to use an uninitialized DefOf of type ThingDefOf. DefOfs are initialized right after all defs all loaded. Uninitialized DefOfs will return only nulls. (hint: don't use DefOfs as default field values in Defs, try to resolve them in ResolveReferences() instead)

-----(Information in the log)-----
Verse.Log:Warning(String, Boolean)
RimWorld.DefOfHelper:EnsureInitializedInCtor(Type)
RimWorld.ThingDefOf:.cctor()
RimWriter.ModMain:ApplySettings()
RimWriter.ModMain:ApplySettings()
RimWriter.ModMain:.ctor(ModContentPack)
System.Reflection.MonoCMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoCMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MonoCMethod:Invoke(BindingFlags, Binder, Object[], CultureInfo)
System.Activator:CreateInstance(Type, BindingFlags, Binder, Object[], CultureInfo, Object[])
System.Activator:CreateInstance(Type, Object[], Object[])
System.Activator:CreateInstance(Type, Object[])
Verse.LoadedModManager:CreateModClasses()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()