ArgumentException: Illegal characters in path while compiling in Android with Vuforia SDK

I am trying to compile an apk, my project uses Vuforia SDK but the problem seems doesn't have to do with vuforia sdk. The log is the following:

 ArgumentException: Illegal characters in path.
 System.IO.Path.Combine (System.String path1, System.String path2) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/Path.cs:124)
 UnityEditor.Android.AndroidSDKTools.BuildToolsExe (System.String command)
 UnityEditor.Android.AndroidSDKTools.get_AAPT ()
 UnityEditor.Android.AndroidSDKTools.DumpDiagnostics ()
 UnityEditor.Android.PostProcessAndroidPlayer..ctor ()
 UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry)
 UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (BuildPostProcessArgs args)
 UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:316)
 UnityEditor.HostView:OnGUI()