where to find buildslave directory

Hello
I'm new with unity and I have a question about buildslave. where I can find this folder in my PC and how I can fix this issue. I don't have any folder under c:\ named buildslave.

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UnityEditor.BuildPlayerWindow+BuildMethodException: 4 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x00234] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:190
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:96
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)
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before it was 2 errors, I found a similar question and someone gives an answer, by deleting the plugin inside assets folder. I delete it and return it back.

I have other errors:

Code (CSharp):

1. Found plugins with same names, Packages/com.unity.xiaomi/ChannelPurchase.dll and Assets/Plugins/UnityChannel/ChannelPurchase.dll. Delete the one of the duplicate plugins.
2. UnityEditor.AndroidPluginImporterExtension:CheckFileCollisions(String)
3. UnityEditorInternal.PluginsHelper:CheckFileCollisions(BuildTarget) (at C:/buildslave/unity/build/Editor/Mono/Plugins/PluginsHelper.cs:25)
4. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
5.  

Code (CSharp):

1. Build completed with a result of 'Failed'
2. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
3.