Importing Post Processing Stack didn't clear the errors

Hi everyone.

First i imported some rock and boulder assets into the project then I received some compiler error messages from console, so i downloaded and imported PPS.. and the rest is as i mentioned in the title.. it didn't work.. still same errors.

After that, i tried to import PPS again and this didn't work aswell.. it become another error issue: override and 'repaint'

Help me please.. i'm in the middle of the project and i cannot run because of these compiler errors.

version of unity: 2018.1.6f

Here is the list of the eror messages:

1 - Assets/Standard Assets/Effects/ImageEffects/Scripts/Antialiasing.cs(20,33): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference? 2 - Assets/Standard Assets/Effects/ImageEffects/Scripts/Bloom.cs(9,26): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference?

3 - Assets/Standard Assets/Effects/ImageEffects/Scripts/ColorCorrectionCurves.cs(8,42): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference? 4 - Assets/Standard Assets/Effects/ImageEffects/Scripts/DepthOfField.cs(9,33): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference?

5 - Assets/Standard Assets/Effects/ImageEffects/Scripts/GlobalFog.cs(9,23): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference? 6 - Assets/Standard Assets/Effects/ImageEffects/Scripts/VignetteAndChromaticAberration.cs(9,51): error CS0246: The type or namespace name PostEffectsBase' could not be found. Are you missing an assembly reference?

7 - Assets/Standard Assets/Effects/ImageEffects/Scripts/Antialiasing.cs(86,30): error CS0115: UnityStandardAssets.ImageEffects.Antialiasing.CheckResources()' is marked as an override but no suitable method found to override 8 - Assets/Standard Assets/Effects/ImageEffects/Scripts/Bloom.cs(83,30): error CS0115: UnityStandardAssets.ImageEffects.Bloom.CheckResources()' is marked as an override but no suitable method found to override

9 - Assets/Standard Assets/Effects/ImageEffects/Scripts/ColorCorrectionCurves.cs(62,30): error CS0115: UnityStandardAssets.ImageEffects.ColorCorrectionCurves.CheckResources()' is marked as an override but no suitable method found to override 10 - Assets/Standard Assets/Effects/ImageEffects/Scripts/DepthOfField.cs(55,30): error CS0115: UnityStandardAssets.ImageEffects.DepthOfField.CheckResources()' is marked as an override but no suitable method found to override

11 - Assets/Standard Assets/Effects/ImageEffects/Scripts/GlobalFog.cs(30,30): error CS0115: UnityStandardAssets.ImageEffects.GlobalFog.CheckResources()' is marked as an override but no suitable method found to override 12 - Assets/Standard Assets/Effects/ImageEffects/Scripts/VignetteAndChromaticAberration.cs(36,30): error CS0115: UnityStandardAssets.ImageEffects.VignetteAndChromaticAberration.CheckResources()' is marked as an override but no suitable method found to override

13 - Assets/PostProcessing/Editor/Utils/CurveEditor.cs(379,45): error CS0619: UnityEngine.EventType.repaint' is obsolete: Use Repaint instead (UnityUpgradable) -> Repaint'

14 - Assets/PostProcessing/Editor/Utils/CurveEditor.cs(425,45): error CS0619: UnityEngine.EventType.mouseDown' is obsolete: Use MouseDown instead (UnityUpgradable) -> MouseDown'

15 - Assets/PostProcessing/Editor/Utils/CurveEditor.cs(456,45): error CS0619: UnityEngine.EventType.mouseDown' is obsolete: Use MouseDown instead (UnityUpgradable) -> MouseDown'

16 - Assets/PostProcessing/Editor/Utils/CurveEditor.cs(502,37): error CS0619: UnityEngine.EventType.mouseDown' is obsolete: Use MouseDown instead (UnityUpgradable) -> MouseDown'

17 - Assets/PostProcessing/Editor/Utils/CurveEditor.cs(585,37): error CS0619: UnityEngine.EventType.keyDown' is obsolete: Use KeyDown instead (UnityUpgradable) -> KeyDown'

18 - Internal error: Recursion detected while updating scripts (assembly name: Assembly-CSharp-Editor.dll)

19 - API updating failed. Check previous console messages.