Validation message showing even if the textfields are not empty about react-material-ui-form-validator HOT 6 CLOSED

import React from 'react'
import RaisedButton from 'material-ui/RaisedButton'
import { ValidatorForm, TextValidator } from 'react-material-ui-form-validator'
// import FlatButton from 'material-ui/FlatButton'
import {blue500} from 'material-ui/styles/colors'
import Person from 'material-ui/svg-icons/social/person'
// import ChatBubble from 'materia-ui/svg-icons/communication/chat-bubble'
import LocationOn from 'material-ui/svg-icons/communication/location-on'
import ThumbUp from 'material-ui/svg-icons/action/thumb-up'
const styles = {
  row: {
    display: 'flex',
    flexDirection: 'row'
  },
  errorStyle: {
    position: 'absolute',
    marginBottom: '-22px',
    color: 'red'
  },
  spaceBetween: {
    justifyContent: 'flex-start'
  },
  divAlignCenter: {
    alignSelf: 'center'
  },
  submitBtn: {
    backgroundColor: blue500
  },
  labelColor: {
    color: 'white'
  }
}

class App extends React.Component {

    constructor (props) {
      super(props)
      this.state = {
        data: {}
      }
      this.validatorListener = this.validatorListener.bind(this)
      this.onChange = this.onChange.bind(this)
      this.handleBlur = this.handleBlur.bind(this)
      this.handleSubmit = this.handleSubmit.bind(this)
    }

    onChange (event) {
      const { data } = this.state
      data[event.target.name] = event.target.value
      this.setState({ data })
    }

    handleSubmit (e) {
      e.preventDefault()
      console.log(this.state.data)
    }
    handleBlur (event) {
      this.refs[event.target.name].validate(event.target.value)
    }
    validatorListener (result) {
      this.setState({ disabled: !result })
    }

    render () {
      return (
          <ValidatorForm
              ref='form'
              onSubmit={this.handleSubmit}
              instantValidate={true}
          >
          <div style={styles.row}>
             <Person/>
             <TextValidator
               key={1}
               ref='firstName'
               name='firstName'
               hintText='Your First Name'
               floatingLabelText='First Name'
               validators={['isEmpty']}
               onBlur={this.handleBlur}
               errorMessages={['required field']}
               errorStyle={styles.errorStyle}
               onChange={this.onChange}
             />
             <TextValidator
               key={2}
               ref='lastName'
               name='lastName'
               hintText='Your Last Name'
               floatingLabelText='Last Name'
               validators={['isEmpty']}
               onBlur={this.handleBlur}
               errorMessages={['required field']}
               errorStyle={styles.errorStyle}
               onChange={this.onChange}
             />
           </div>
           <TextValidator
             key={3}
             name='message'
             hintText='Message'
             floatingLabelText='Any message'
             multiLine
             fullWidth
             rows={2}
           />
           <div style={Object.assign({}, styles.row, styles.spaceBetween)}>
             <LocationOn/>
             <TextValidator
               key={4}
               ref='location'
               name='location'
               hintText='Your City'
               floatingLabelText='From where you would be travelling'
               validators={['isEmpty']}
               errorMessages={['required field']}
               errorStyle={styles.errorStyle}
               onBlur={this.handleBlur}
               onChange={this.onChange}
             />
             <div style={styles.divAlignCenter}>
               <RaisedButton
                 type='submit'
                 label={'Submit'}
                 labelPosition='before'
                 icon={<ThumbUp />}
                 backgroundColor={blue500}
                 labelStyle={styles.labelColor}
               />
             </div>
           </div>
          </ValidatorForm>
      )
    }
}

export default App