A simple entry project is built using create-react-app 1.5.2, but the following error message always appears during use:
:WebSocket connection to "ws://localhost:3000/sockjs-node/005/a3iekcct/websocket" failed: websocket.js: 6 Error in connection establishment: net::ERR_ADDRESS_IN_USE
:
in short, after repeatedly refreshing the page, the console is in an unknown state of normal, error figure 1, and error figure 2.
A novice has just started to learn React, and asked the old man to tell me what the reason is. Is there any solution?