fis some issues on Create Webinar ...

Controllers/XWebinarServiceControllerBase.cs

@@ -90,12 +90,19 @@ namespace xWebinarService.Controllers
                 }
 
                 //
-                var tagList = tags.ParseListString<string>();
+                // Preparing Tags List ...
+                var tagList = new List<string>();
+                if (!tags.IsNullOrEmpty()) { 
+                    tags.ParseListString<string>();
+                }
+
+                //
                 var result = await WebinarProvider
                     .CreateWebinar(
                         item: item,
                         files: files,
                         tags: tagList,
+                        userInfo: userInfo,
                         connectionId: connectionId
                 );