求大佬帮看看这是咋回事

System.MissingMethodException: Method not found: 'Verse.PawnGenerationRequest..ctor'.
at RimWorld.ScenPart_CreateIncident.Tick () [0x00000] in <filename unknown>:0
at RimWorld.Scenario.TickScenario () [0x00000] in <filename unknown>:0
at Verse.TickManager.DoSingleTick () [0x00000] in <filename unknown>:0
Verse.Log:Error(String)
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()