Fix #6837

Author: dannyBies

src/Middleware/NodeServices/src/HostingModels/NodeInvocationException.cs

@@ -26,7 +26,7 @@ public class NodeInvocationException : Exception
         /// <param name="message">A description of the exception.</param>
         /// <param name="details">Additional information, such as a Node.js stack trace, representing the exception.</param>
         public NodeInvocationException(string message, string details)
-            : base(message + Environment.NewLine + details)
+            : base(string.IsNullOrWhiteSpace(details) ? message : message + Environment.NewLine + details)
         {
         }
 
@@ -52,4 +52,4 @@ public NodeInvocationException(string message, string details, bool nodeInstance
             AllowConnectionDraining = allowConnectionDraining;
         }
     }
-}
+}