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Thank you very much, that was the problem and i have fix it.
I have a subdomain the demo.e-mediums.com and this subdomain show the error "net::ERR_SSL_PROTOCOL_ERROR" when the same socket call is used. Can you help me please with this too?
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://demo.e-mediums.com:3000/socket.io-client/?token=null&EIO=3&transport=polling&t=NXdHv2X. (Reason: CORS request did not succeed).