it working on localhost - just using react with yarn build – this is my package.json file - is that helpful?
"name": "xxx",
“version”: “2.1.1”,
“private”: true,
“scripts”: {
“start”: “react-app-rewired start”,
“build”: “react-app-rewired build”,
“test”: “react-app-rewired test”,
“lint-staged”: “lint-staged”,
“prettier”: “prettier --write “src//*.{js,jsx,ts,tsx,scss,less}"",
“eslint”: “eslint --ext .js,jsx src”,
“tslint”: "tslint "src//.{ts,tsx}"",
“stylelint”: "stylelint "src/**/.{scss,less}””
},
“husky”: {
“hooks”: {
“pre-commit”: “npm run lint-staged”
}
},
“lint-staged”: {
“src//*.{js,jsx,ts,tsx,scss,less}": [
“prettier --write”,
“git add”
],
"src//.{js,jsx}": [
“eslint”
],
"src/**/.{scss,less}”: [
“stylelint”
]
},
“dependencies”: {
“@rowno/sparkline”: “^3.0.1”,
“antd”: “^3.13.2”,
“bootstrap-css-only”: “^4.2.1”,
“chart.js”: “^2.7.3”,
“chartist”: “^0.11.0”,
“chartist-plugin-tooltips-updated”: “^0.0.20”,
“classnames”: “^2.2.6”,
“connected-react-router”: “^6.3.1”,
“d3-dsv”: “^1.1.1”,
“d3-format”: “^1.3.2”,
“d3-time-format”: “^2.1.3”,
“enquire-js”: “^0.2.1”,
“firebase”: “^5.8.2”,
“history”: “^4.7.2”,
“lodash”: “^4.17.11”,
“nprogress”: “^0.2.0”,
“peity-react”: “^0.0.7”,
“prop-types”: “^15.7.1”,
“qs”: “^6.6.0”,
“rc-drawer”: “^1.7.7”,
“react”: “^16.8.1”,
“react-c3js”: “^0.1.20”,
“react-chartist”: “^0.13.3”,
“react-chartjs-2”: “^2.7.4”,
“react-custom-scrollbars”: “^4.2.1”,
“react-dom”: “^16.8.1”,
“react-draft-wysiwyg”: “^1.13.1”,
“react-helmet”: “^5.2.0”,
“react-intl”: “^2.8.0”,
“react-loadable”: “^5.5.0”,
“react-redux”: “^6.0.0”,
“react-redux-spinner”: “^2.0.0”,
“react-router”: “^4.3”,
“react-router-dom”: “^4.3.1”,
“react-router-redux”: “^4.0.8”,
“react-scripts”: “2.1.5”,
“react-stockcharts”: “^0.7.8”,
“redux”: “^4.0.1”,
“redux-logger”: “^3.0.6”,
“redux-saga”: “^1.0.1”,
“redux-thunk”: “^2.3.0”,
“store”: “^2.0.12”
},
“devDependencies”: {
“@babel/plugin-proposal-decorators”: “^7.3.0”,
“babel-plugin-import”: “^1.11.0”,
“customize-cra”: “^0.2.11”,
“eslint-config-airbnb”: “^17.1.0”,
“eslint-config-prettier”: “^4.0.0”,
“husky”: “^1.3.1”,
“less”: “^3.9.0”,
“less-loader”: “^4.1.0”,
“lint-staged”: “^8.1.3”,
“node-sass”: “^4.11.0”,
“react-app-rewired”: “^2.1.0”,
“stylelint”: “^9.10.1”,
“stylelint-config-prettier”: “^4.0.0”,
“stylelint-config-standard”: “^18.2.0”
},
“browserslist”: [
“>0.2%”,
“not dead”,
“not ie <= 11”,
“not op_mini all”
]
}
it just working right now. I’ve just uploaded yarn.lock file to github manually and then it worked. Thank you so much talves 
I am in the habit of submitting my 