Maybe someone could tell me what it means

[Dirmagnos]

I have a lot of mods and i cant figure out which one is causing it. It wasnt there at first, but now i cant get rid of it, despite the fact that there are no new mods added.

As far as game goes apparently it prevents plants from growing.

MissingMethodException: void Clearable.MarkForClear(bool)
  at SimAndRenderScheduler+Sim4000msUpdater.Update (ISim4000ms updater, System.Single dt) [0x00000] in <e3c6a70dbf804766b5f7ed03fef8497e>:0 
  at UpdateBucketWithUpdater`1[DataType].Update (System.Single dt) [0x00088] in <e3c6a70dbf804766b5f7ed03fef8497e>:0 
  at StateMachineUpdater+BucketGroup.AdvanceOneSubTick (System.Single dt) [0x0002d] in <e3c6a70dbf804766b5f7ed03fef8497e>:0 
  at StateMachineUpdater.AdvanceOneSimSubTick () [0x00025] in <e3c6a70dbf804766b5f7ed03fef8497e>:0 
  at Game.SimEveryTick (System.Single dt) [0x0006c] in <e38a27e719b642cba3ce0b7a77b47055>:0 
  at Game.Update () [0x00120] in <e38a27e719b642cba3ce0b7a77b47055>:0 

[AzeTheGreat]

Can't be identified from the stack trace alone.  Since it's affecting plants, I'd try removing all mods that affect plants and see if that fixes it.  If it does, then start splitting those mods in half and testing each half until you find the culprit.