WebRTC(simple-peer) doesn't get the signal after I added APIs on server - webrtc

Question

I am using simple-peer and it really worked well on server before I added APIs for my project. I already did secure with https in the beginning and the only thing that has changed is releasing the server with APIs... Here is my code and now I only can check console.log(1), (3) for initiator peer and console.log(2), (8) for requesting peer. On requestinng peer internet tab, "Uncaught ReferenceError: process is not defined" this error occurs and I don't know why this error occurs on client side. Also it worked well on both of Chrome and Edge but now I can't even get my own stream on Chrome.
const myVideo = useRef();
const userVideo = useRef();
const connectionRef = useRef();
const roomName = "123";
let userStream = null;
let creator = false;
useEffect(() => {
const socket = io("https://www.jg-jg.shop");
socket.emit("joinRoom", roomName);
socket.on("created", () => {
creator = true;
navigator.mediaDevices
.getUserMedia({ video: true, audio: true })
.then((stream) => {
userStream = stream;
myVideo.current.srcObject = stream;
console.log(1);
});
});
socket.on("joined", () => {
navigator.mediaDevices
.getUserMedia({ video: true, audio: true })
.then((stream) => {
userStream = stream;
myVideo.current.srcObject = stream;
console.log(2);
});
socket.emit("ready", roomName);
});
socket.on("ready", () => {
if (creator) {
const peer = new Peer({
initiator: true,
trickle: false,
stream: userStream,
});
peer.on("signal", (signal) => {
socket.emit("sendingSignal", { signal, roomName });
console.log(3);
});
peer.on("stream", (stream) => {
userVideo.current.srcObject = stream;
console.log(4);
});
socket.on("receivingSignal", (signal) => {
peer.signal(signal);
console.log(5);
});
connectionRef.current = peer;
}
});
socket.on("offer", (incomingSignal) => {
if (!creator) {
const peer = new Peer({
initiator: false,
trickle: false,
stream: userStream,
});
peer.on("signal", (signal) => {
socket.emit("returningSignal", { signal, roomName });
console.log(6);
});
peer.on("stream", (stream) => {
userVideo.current.srcObject = stream;
console.log(7);
});
peer.signal(incomingSignal);
console.log(8);
connectionRef.current = peer;
}
});
}, []);