Improved error message

Author: toshiakit

+llms/+stream/responseStreamer.m

@@ -45,9 +45,8 @@
                     catch ME
                         errID = 'llms:stream:responseStreamer:InvalidInput';
                         msg = "Input does not have the expected json format. " + str{i};
-                        causeException = MException(errID,msg);
-                        ME = addCause(ME,causeException);
-                        rethrow(ME)
+                        ME = MException(errID,msg);
+                        throw(ME)
                     end
                     if ischar(json.choices.finish_reason) && ismember(json.choices.finish_reason,["stop","tool_calls"])
                         stop = true;