WebRTC is not working via shadowsocks!

Hi folks, You are doing great as always. We have shadowsocks server and using outline client for traffic of end user to forward through SS server but due to some reason WebRTC is not working. What changes should I made to following configuration ?

“server”:“IP Address of Server”,
“fast_open”: true,
“mode”: “tcp_and_udp”

@admin any skilled person who is handling or working with this.