Bugfix/Throw error to prevent SSE from retrying (#3281)

throw error to prevent SSE from retrying

packages/ui/src/views/chatmessage/ChatMessage.jsx

@@ -841,6 +841,7 @@ export const ChatMessage = ({ open, chatflowid, isAgentCanvas, isDialog, preview
             async onerror(err) {
                 console.error('EventSource Error: ', err)
                 closeResponse()
+                throw err
             }
         })
     }