Type Error:Cannot read property of Unit undefined

Question

Hi have added a new text box under the render which is Units and it works fine in local machine but throws error in server built . Does it has to be mounted with the component . Am new to reactjs could some one suggest .

import React from 'react';

class TextboxInputView extends React.Component {

    constructor(props) {
        super(props);
        this.state = {
            value: ''
        }
    }

    onValueChanged(e) {
        var newValue = e.target.value;
        this.setState({ value: newValue });
        if (this.props.valueChanged != null)
            this.props.valueChanged(newValue);
    }

    render() {
        var unitsCheck = "";
        if (this.props.data.Unit != "") { unitsCheck = <input id="Units" className='col-md-4' Style='font-weight:normal' readOnly type="text" value={this.props.data.Unit} /> }
        return <div key={this.props.Id}>
            <label>
                <input type="text" className='col-md-6' value={this.state.value} onChange={(e) => this.onValueChanged(e)} /> {this.props.Name}
                {unitsCheck}
            </label>
        </div>;
    }

    getDefaultValue() {
        var defaultValue = null;
        if (this.props.defaultValues != null && this.props.defaultValues.length === 1 && this.props.defaultValues[0] !== '')
            defaultValue = this.props.defaultValues[0];
        return defaultValue;
    }

    componentDidMount() {
        var defaultValue = this.getDefaultValue();

        if (defaultValue != null && this.state.value !== defaultValue) {
            this.onValueChanged({ target: { value: defaultValue } });
        }
    }

    componentWillReceiveProps(nextProps) {
        if (this.props !== nextProps && nextProps.isResetValues) {
            let defaultValue = this.getDefaultValue();
            defaultValue = defaultValue === null ? '' : defaultValue;

            if (this.state.value !== defaultValue) {
                this.onValueChanged({ target: { value: defaultValue } });
            }
        }
    }
}

export default TextboxInputView