I tried to uninstall the new DLC, but still didn't work :/

I have a crash log related to the Stairs mod. I have quite a lot of mods installed, but pinpointed this one to be the issue. Hope this helps.

Exception while loading mod Stairs at C:/Users/maaim/OneDrive/Documents/Klei/OxygenNotIncluded/mods/Steam/2012810337.
HarmonyLib.HarmonyException: Patching exception in method null ---> System.ArgumentException: Undefined target method for patch method static System.Void Stairs.BuildingDef_IsAreaClear_Patch::Postfix(BuildingDef __instance, System.Boolean& __result, UnityEngine.GameObject source_go, System.Int32 cell, Orientation orientation, ObjectLayer layer, ObjectLayer tile_layer, System.Boolean replace_tile, System.Boolean restrictToActiveWorld, System.String& fail_reason)
at HarmonyLib.PatchClassProcessor.PatchWithAttributes (System.Reflection.MethodBase& lastOriginal) [0x00047] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at HarmonyLib.PatchClassProcessor.Patch () [0x00068] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
--- End of inner exception stack trace ---
at HarmonyLib.PatchClassProcessor.ReportException (System.Exception exception, System.Reflection.MethodBase original) [0x00127] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at HarmonyLib.PatchClassProcessor.Patch () [0x00093] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at HarmonyLib.Harmony.<PatchAll>b__10_0 (System.Type type) [0x00007] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at HarmonyLib.CollectionExtensions.Do[T] (System.Collections.Generic.IEnumerable`1[T] sequence, System.Action`1[T] action) [0x00014] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at HarmonyLib.Harmony.PatchAll (System.Reflection.Assembly assembly) [0x00006] in <6dcb326e4f6442999f701f1e67d0b5a0>:0
at KMod.UserMod2.OnLoad (HarmonyLib.Harmony harmony) [0x00007] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
at Stairs.Patches.OnLoad (HarmonyLib.Harmony harmony) [0x00000] in <fb027ff0296247f0bfcb907b43df4b26>:0
at KMod.DLLLoader.LoadDLLs (KMod.Mod ownerMod, System.String harmonyId, System.String path, System.Boolean isDev) [0x00222] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0

at UnityEngine.Debug.LogError (System.Object message, UnityEngine.Object context) [0x00000] in <82f243aab18c4f32918da2df41974365>:0
at Debug.LogError (System.Object obj, UnityEngine.Object context) [0x00000] in <32517cdba6dd450ea2db1abbdb923443>:0
at DebugUtil.LogErrorArgs (UnityEngine.Object context, System.Object[] objs) [0x00000] in <32517cdba6dd450ea2db1abbdb923443>:0
at DebugUtil.LogException (UnityEngine.Object context, System.String errorMessage, System.Exception e) [0x00000] in <32517cdba6dd450ea2db1abbdb923443>:0
at KMod.DLLLoader.LoadDLLs (KMod.Mod ownerMod, System.String harmonyId, System.String path, System.Boolean isDev) [0x00000] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
at KMod.Mod.Load (KMod.Content content) [0x00000] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
at KMod.Manager.Load (KMod.Content content) [0x00000] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
at Global.Awake () [0x00000] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
at UnityEngine.Object.Internal_InstantiateSingleWithParent_Injected (UnityEngine.Object , UnityEngine.Transform , UnityEngine.Vector3& , UnityEngine.Quaternion& ) [0x00000] in <82f243aab18c4f32918da2df41974365>:0
at UnityEngine.Object.Internal_InstantiateSingleWithParent (UnityEngine.Object data, UnityEngine.Transform parent, UnityEngine.Vector3 pos, UnityEngine.Quaternion rot) [0x00000] in <82f243aab18c4f32918da2df41974365>:0
at UnityEngine.Object.Instantiate (UnityEngine.Object original, UnityEngine.Vector3 position, UnityEngine.Quaternion rotation, UnityEngine.Transform parent) [0x00000] in <82f243aab18c4f32918da2df41974365>:0
at UnityEngine.Object.Instantiate[T] (T original, UnityEngine.Vector3 position, UnityEngine.Quaternion rotation, UnityEngine.Transform parent) [0x00000] in <82f243aab18c4f32918da2df41974365>:0
at Util.KInstantiate (UnityEngine.GameObject original, UnityEngine.Vector3 position, UnityEngine.Quaternion rotation, UnityEngine.GameObject parent, System.String name, System.Boolean initialize_id, System.Int32 gameLayer) [0x00000] in <32517cdba6dd450ea2db1abbdb923443>:0
at Util.KInstantiate (UnityEngine.GameObject original, UnityEngine.GameObject parent, System.String name) [0x00000] in <32517cdba6dd450ea2db1abbdb923443>:0
at LaunchInitializer.Update () [0x00000] in <0a2895d5c82a47bb81d4ef7d78009a8f>:0
Build: U56-674504-SCR

The crash has been fixed, pls update this mod to "2.0e".

Originally posted by !-嘿嘿嘿-!:

The crash has been fixed, pls update this mod to "2.0e".

Thank you from all of us for this quick fix!!!