SelectRow

When I use select row, it does not appear in the table.
IMG: https://ibb.co/dULcKS

` render() {
const selectRow = {
mode: 'checkbox', // multi select
clickToSelectAndEditCell: true
};`

Table:
`
ID
Nome
Conta
`

package.json:
`{
"name": "crud",
"version": "0.1.0",
"private": true,
"dependencies": {
"axios": "^0.18.0",
"bootstrap": "4.0.0",
"font-awesome": "^4.7.0",
"mdbreact": "file:D:/re-pro-master",
"react": "^16.3.2",
"react-bootstrap-table": "^4.3.1",
"react-dom": "^16.3.2",
"react-error-overlay": "^4.0.0",
"react-scripts": "1.1.4",
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
}
}
`
Why can this be happening?