TypeError: Cannot read property 'string' of undefined

[lahirukawijes]

• Regarding the above error came up with the TextFieldGroup.js.
• This worked for me
• React is no more shipped with PropTypes. You will need to install it.
• First install the prop-types package by running npm i prop-types --save.
• Next use the prop-types package into your component like this:

import React from 'react'
import PropTypes from 'prop-types'

export const AwesomeComponent = props => {
    return(
        <h1>Hello {props.name}</h1>
    )
}

AwesomeComponent.propTypes = {
    name: PropTypes.string.isRequired
}