Why i had it what i can do to fix it

What can I do to fix it?

UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002da] in <5092d70d16a64dd9a555dd50f38aead0>:0
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in <5092d70d16a64dd9a555dd50f38aead0>:0
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)