https://www.youtube.com/watch?v=UuXZnX6cY6A
This video should help.
I don't think so...
Building Builds\index.html failed with output:
UnityEditor.GenericMenu:CatchMenu (object,string[],int)
Building Builds\Build\Builds.loader.js failed with output:
Access is denied.
UnityEditor.GenericMenu:CatchMenu (object,string[],int)
BuildFailedException: Incremental Player build failed!
UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <4e64905d831f4883a53259ef37fb023b>:0)
UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:158)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <4e64905d831f4883a53259ef37fb023b>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.Int32 subtarget, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <4e64905d831f4883a53259ef37fb023b>:0)
UnityEditor.GenericMenu:CatchMenu(Object, String[], Int32)
Build completed with a result of 'Failed' in 343 seconds (342535 ms)
UnityEditor.GenericMenu:CatchMenu (object,string[],int)
UnityEditor.BuildPlayerWindow+BuildMethodException: 5 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002da] in <4e64905d831f4883a53259ef37fb023b>:0
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in <4e64905d831f4883a53259ef37fb023b>:0
UnityEditor.GenericMenu:CatchMenu (object,string[],int)