i'm am pretty new to angular and i got the task to remake a webapp. when i run the app the console keeps saying

`WebSocketClient.js:16 WebSocket connection to 'wss://localhost:4202/ws' failed: 
WebSocketClient @ WebSocketClient.js:16
initSocket @ socket.js:21
(anonymous) @ socket.js:45
timer @ zone.js:2561
invokeTask @ zone.js:406
runTask @ zone.js:178
invokeTask @ zone.js:487
ZoneTask.invoke @ zone.js:476
data.args.<computed> @ zone.js:2541
index.js:561 [webpack-dev-server] Event {isTrusted: true, type: 'error', target: WebSocket, currentTarget: WebSocket, eventPhase: 2, …}`

I have no idea on how to fix this...enter image description here