Websocket connection failed error

I had previously tried setting up Nginx with a Droplet but wasn’t successful. I deleted the Droplet and then deployed my app from the Apps service. The app is live but I’m getting the error:

“WebSocketClient.js:13 WebSocket connection to ‘wss://’”.

Is it possible that some bad configuration from the Droplet and Nginx was leftover and is causing this conflict?


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Bobby Iliev
Site Moderator
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June 1, 2023
Accepted Answer

Hi there,

I think that when instantiating the web socket, you should not add the port as it is not publicly exposed on the App Platform.

Instead you should do something like this:

const protocol = window.location.protocol.includes('https') ? 'wss': 'ws'
const ws = new WebSocket(`${protocol}://${}/ws`);

Here is a great step by step tutorial that covers the whole process specifically for the App Platform:


It looks like that this is a standard thing for some React apps:

What you have to do is to define an environment variable in your app platform and define the WDS_SOCKET_PORT variable and set it to 443 rather than the default value.

You can check that this would already work by visiting your website and in the web console run:

new WebSocket('wss://');

Let me know if you have any questions!



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