In my index page i'm using serverSideTranslations function. getting error about finding file of translation. this error happens only on pages that used by serverSideTranslations .
I deployed to Vercel and Netlify. in both of them i'v got the same error.
in _app.js i'm using appWithTranslation .
Dependencies:

"dependencies": {
    "@fortawesome/fontawesome-free": "^5.15.4",
    "@netlify/plugin-nextjs": "^3.9.2",
    "axios": "^0.21.1",
    "bootstrap": "^4.6.0",
    "dayjs": "^1.10.4",
    "dotenv": "^8.2.0",
    "fs-extra": "^10.0.0",
    "is-mobile": "^3.0.0",
    "next": "^11.1.2",
    "next-i18next": "^8.9.0",
    "next-seo": "^4.20.0",
    "node-fetch": "^2.6.1",
    "parse": "^3.1.0",
    "react": "17.0.1",
    "react-bootstrap": "^1.5.0",
    "react-dom": "17.0.1",
    "react-infinite-scroller": "^1.2.4",
    "recoil": "^0.1.2",
    "sass": "^1.43.2",
    "ts-node": "^9.1.1"
  }

next.config.js

const path = require('path');
const { PHASE_DEVELOPMENT_SERVER } = require('next/constants')
const i18NextConfig = require('./next-i18next.config');

const prodConfig = {
    generateBuildId: () => 'build-id',
    compress: true,
    target: 'serverless',
    i18n: i18NextConfig.i18n,
    sassOptions: {
        includePaths: [path.join(__dirname, 'styles')],
    },
}
module.exports = (phase, { defaultConfig }) => {
    if (phase === PHASE_DEVELOPMENT_SERVER) {
        return {
            ...defaultConfig,
            ...prodConfig,
            compress: false,
        }
    }

    return prodConfig;
}

next-i18next.config.js

const path = require('path');

module.exports = {
  i18n: {
    defaultLocale: 'he',
    locales: ['he'],
    localePath: path.resolve('./locales'), // <<< i tried to put this line here
  },
  keySeparator: '>',
  nsSeparator: '|',
  reloadOnPrerender: false,
  localePath: path.resolve('./locales'), // <<< and also here
};

Error message from Vercel lambda function

ng request: Error: ENOENT: no such file or directory, scandir '/var/task/public/locales/he' at Object.readdirSync (fs.js:1043:3) at getLocaleNamespaces (/var/task/node_modules/next-i18next/dist/commonjs/config/createConfig.js:175:23) at /var/task/node_modules/next-i18next/dist/commonjs/config/createConfig.js:181:20 at Array.map () at getNamespaces (/var/task/node_modules/next-i18next/dist/commonjs/config/createConfig.js:180:44) at createConfig (/var/task/node_modules/next-i18next/dist/commonjs/config/createConfig.js:221:29) at _callee$ (/var/task/node_modules/next-i18next/dist/commonjs/serverSideTranslations.js:199:53) at tryCatch (/var/task/node_modules/regenerator-runtime/runtime.js:63:40) at Generator.invoke [as _invoke] (/var/task/node_modules/regenerator-runtime/runtime.js:294:22) at Generator.next (/var/task/node_modules/regenerator-runtime/runtime.js:119:21) { errno: -2, syscall: 'scandir', path: '/var/task/public/locales/he' }