React에서 \'구문 분석 오류: 인접한 JSX 요소는 둘러싸는 태그에 래핑되어야 합니다\' 오류가 발생하는 이유는 무엇입니까?

<code class="javascript">render: function() {
  var text = this.state.submitted ? 'Thank you!  Expect a follow up at '+email+' soon!' : 'Enter your email to request early access:';
  var style = this.state.submitted ? {"backgroundColor": "rgba(26, 188, 156, 0.4)"} : {};
  return (
    <div>
      {this.state.submitted == false && (
        <>
          <input type="email" className="input_field" onChange={this._updateInputValue} ref="email" value={this.state.email} />

          <ReactCSSTransitionGroup transitionName="example" transitionAppear={true}>
            <div className="button-row">
              <a href="#" className="button" onClick={this.saveAndContinue}>Request Invite</a>
            </div>
          </ReactCSSTransitionGroup>
        </>
      )}
    </div>
  )
},</code>