I am getting this error and I don;t know what else to do.
I am using next.js and my code looks like this.
The _app.js:
import '../styles/globals.scss'
import React from 'react'
import Layout from '../components/Layout'
import Head from "next/head";
import Signin from "./signin";
import Register from "./register";
import { DataProvider } from "../store/GlobalState";
function MyApp ({
                    Component,
                    pageProps
                }) {
    if (typeof window !== 'undefined') {
        if (window.location.pathname === '/signin') {
            return (
                <DataProvider>
                    <Signin/>
                </DataProvider>
            )
        } else if (window.location.pathname === '/register') {
            return (
                <DataProvider>
                    <Register/>
                </DataProvider>
            )
        }
    }
    return (
            <DataProvider>
                <Head>
                    <title>Above the Sky</title>
                </Head>
                <Layout>
                    <Component {...pageProps} />
                </Layout>
            </DataProvider>
    )
}
export default MyApp
I am doing this because I want the register and the login pages to be separate from the layout, not having any header or footer whatsoever... If you have a hint on this , how I should do this better please tell me .... but this is not the main problem..
and now the Register.js:
import Head from 'next/head'
import { useContext, useEffect, useState } from "react";
import Link from 'next/link'
import valid from '../utils/valid'
import { DataContext } from "../store/GlobalState";
const Register = () => {
    const [ mounted, setMounted ] = useState(false);
    const initialState = {
        email: '',
        password: '',
        cf_password: ''
    };
    const [ userData, setUserData ] = useState(initialState);
    const {
              email,
              password,
              cf_password
          } = userData;
    const {
              state,
              dispatch
          } = useContext(DataContext)
    const handleChangeInput = e => {
        const {
                  name,
                  value
              } = e.target
        setUserData({
            ...userData,
            [name]: value
        })
        dispatch({
            type: 'NOTIFY',
            payload: {}
        })
    }
    const handleSubmit = async e => {
        e.preventDefault()
        const errorMessage = valid(email, password, cf_password)
        if (errorMessage) {
            return dispatch({
                type: 'NOTIFY',
                payload: { error: errorMessage }
            })
        }
        dispatch({
            type: 'NOTIFY',
            payload: { success: 'Ok' }
        })
    }
    useEffect(() => {
        setMounted(true)
    }, [])
    return (
        mounted
        &&
        <div style={{
            backgroundColor: 'black',
            height: '100vh'
        }}>
            <Head>
                <title>Register Page</title>
            </Head>
            <div className="login-dark" style={{ height: "695px" }}>
                <form className='container' onSubmit={handleSubmit}>
                    <div className="illustration"><i className="fas fa-thin fa-user-plus"/></div>
                    <div className="mb-3">
                        <label htmlFor="exampleInputEmail1" className="form-label">Email address</label>
                        <input type="email" className="form-control" id="exampleInputEmail1" aria-describedby="emailHelp"
                               name="email" value={email} onChange={handleChangeInput}/>
                        <div id="emailHelp" className="form-text">We'll never share your email with anyone else.</div>
                    </div>
                    <div className="mb-3">
                        <label htmlFor="exampleInputPassword1" className="form-label">Password</label>
                        <input type="password" className="form-control" id="exampleInputPassword1"
                               name="password" value={password} onChange={handleChangeInput}/>
                    </div>
                    <div className="mb-3">
                        <label htmlFor="exampleInputPassword2" className="form-label">Confirm Password</label>
                        <input type="password" className="form-control" id="exampleInputPassword2"
                               name="cf_password" value={cf_password} onChange={handleChangeInput}/>
                    </div>
                    <div className='button-container'>
                        <button type="submit" className="btn btn-primary btn-block">Register</button>
                    </div>
                    <a className="forgot" href="#">Forgot your email or password?</a>
                    <p className="have-account">Already have an account ?    <Link href="/signin"><a style={{ color: 'crimson' }}>Login here</a></Link></p>
                </form>
            </div>
        </div>
    )
}
export default Register
When I render the register page I get this error in the console .. "next-dev.js?3515:32 Warning: Did not expect server HTML to contain a in ."
These are my store files aswell:
Actions.js
export const ACTIONS = {
    NOTIFY: 'NOTIFY',
    AUTH: 'AUTH'
}
Reducer.js
import { ACTIONS } from './Actions';
const reducers = (state, action) => {
    switch (action.type) {
        case ACTIONS.NOTIFY:
            return {
                ...state,
                notify: action.payload
            };
        case ACTIONS.AUTH:
            return {
                ...state,
                auth: action.payload
            };
        default:
            return state;
    }
}
export default reducers
and the GlobalState.js
import { createContext, useReducer } from "react";
import reducers from "./Reducers";
export const DataContext = createContext()
export const DataProvider = ({ children }) => {
    const initialState = {
        notify: {},
        auth: {}
    }
    const [ state, dispatch ] = useReducer(reducers, initialState)
    const { cart, auth } = state
    return (
        <DataContext.Provider value={{
            state,
            dispatch
        }}>
            {children}
        </DataContext.Provider>
    )
}
