react native - Element type is invalid: expected a string... but got: undefined -

react-native error:

element type invalid... check render method of 'tripcreate'

code tripcreate.js file:

i trying navigate user create new trip form keep running 'invalid element error"... idea might doing wrong? thank help.

import react, { component } 'react'; import { view, text } 'react-native'; import { connect } 'react-redux'; import { tripupdate, tripcreate } '../actions'; import { card, cardsection, forminput, button } './common';  class tripcreate extends component {   onbuttonpress() {      const { name, start_date, end_date } = this.props;       this.props.tripcreate({ name, start_date, end_date });     }     render() {       return (         <view>           <card>             <cardsection>               <forminput                 label="name"                 placeholder="jane"                 value={this.props.name}                 onchangetext={value => this.props.tripupdate({ prop: 'name', value })}               />             </cardsection>              <cardsection>               <forminput                 label="trip start date"                 placeholder="2017-09-01"                 value={this.props.start_date}                 onchangetext={value => this.props.tripupdate({ prop: 'start_date', value })}               />             </cardsection>              <cardsection>               <forminput                 label="trip end date"                 placeholder="2017-09-15"                 value={this.props.end_date}                 onchangetext={value => this.props.tripupdate({ prop: 'end_date', value })}               />             </cardsection>              <cardsection>                 <button onpress={this.onbuttonpress.bind(this)}>                   create trip                 </button>             </cardsection>           </card>         </view>       );     }   }   const mapstatetoprops = (state) => {     const {name,start_date,end_date } = state.tripsform;      return {name,start_date,end_date};   };   export default connect(mapstatetoprops, {tripupdate})(tripcreate);