问无法使用React呈现html div？

EN

class History extends Component {
  constructor(props) {
  super(props);
  this.state = {
    info: ""
  };
  this.generateDivs = this.generateDivs.bind(this);
}

async getCurrentHistory(address) {
  const info = await axios.get(`https://api3.tzscan.io/v2/bakings_history/${address}?number=10000`);
  return info.data[2];
}

async getHistory() {
  const info = await getCurrentHistory(
    "tz1hAYfexyzPGG6RhZZMpDvAHifubsbb6kgn"
  );
  this.setState({ info });
}

generateDivs() {
  const arr = this.state.info;
  const listItems = arr.map((cycles) => 
      <div class="box-1">
        Cycle: {cycles.cycle}
        Count: {cycles.count.count_all}
        Rewards: {cycles.reward}
      </div>
  );
  return (
    <div class="flex-container">
      { listItems }
    </div>
  )
}

componentWillMount() {
  this.getHistory();
}

render() {
  return (
    <div>
      <button onClick={this.generateDivs}>make divs</button>
    </div>
  );
}