I get this from Quality builder mod:
Code Select
Type ModInitializer probably needs a StaticConstructorOnStartup attribute, because it has a field obj of type GameObject. All assets must be loaded in the main thread.
Verse.Log:Warning(String, Boolean)
Verse.StaticConstructorOnStartupUtility:ReportProbablyMissingAttributes()
Verse.PlayDataLoader:<DoPlayLoad>m__2()
Verse.LongEventHandler:ExecuteToExecuteWhenFinished()