update client sync

MediaBrowser.Api/EnvironmentService.cs

@@ -1,4 +1,5 @@
-using MediaBrowser.Common.Net;
+using MediaBrowser.Common.IO;
+using MediaBrowser.Common.Net;
 using MediaBrowser.Controller.Net;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Net;
@@ -8,7 +9,6 @@ using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
 using System.Linq;
-using MediaBrowser.Common.IO;
 
 namespace MediaBrowser.Api
 {
@@ -138,8 +138,16 @@ namespace MediaBrowser.Api
                 return ToOptimizedSerializedResultUsingCache(GetNetworkShares(path).OrderBy(i => i.Path).ToList());
             }
 
+            try
+            {
                 return ToOptimizedSerializedResultUsingCache(GetFileSystemEntries(request).OrderBy(i => i.Path).ToList());
             }
+            catch (UnauthorizedAccessException)
+            {
+                // Don't throw the original UnauthorizedAccessException because it will cause a 401 response
+                throw new ApplicationException("Access to the path " + request.Path + " is denied.");
+            }
+        }
 
         public object Get(GetNetworkShares request)
         {