sockjs/sockjs-node

Uncaught Error: Incompatible SockJS! Main site uses: "1.3.0", the iframe: "1.4.0". at VM601 sockjs.min.js:2

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I have tried with vert.x in node.js react application by connecting Vert.x deployed in server,
I am facing following error in browser.
Uncaught Error: Incompatible SockJS! Main site uses: "1.3.0", the iframe: "1.4.0".
at VM601 sockjs.min.js:2

Also sometimes taking time to get connected, any thoughts

This error is because your server is configured to use a different version of SockJS than your client is.