Next.js | ReferenceError: React is not defined

.babelrc 에 { "runtime" : "automatic" } 추가

 - 전체코드 

{
    "presets": [
        "next/babel",
        [
            "@babel/preset-env",
            {
                "targets": {
                    "chrome": "91",
                    "firefox": "89"
                }
            }
        ],
        [
            "@babel/preset-react",
            {
                "runtime": "automatic"
            }
        ]
    ],
    "plugins": [
        "@emotion"
    ]
}