When building a project, it gives out 2 errors for which I could not find an answer?

Question

Unity

Build completed with a result of 'Failed' in 65 seconds (64813 ms)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002bb ] in <2f1c602eae0d45c293fff3e3aef759fa>:0
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in <2f1c602eae0d45c293fff3e3aef759fa>:0
UnityEngine.GUI59fa>:0 UnityEngine.GUItP2