在Reactjs中使用axios请求对象数组，但收到错误: this.state.employees.map不是函数

import React, { Component } from 'react';
import axios from 'axios';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      employees: [] // 初始化为一个空数组
    };
  }

  componentDidMount() {
    axios.get('https://api.example.com/employees')
      .then(response => {
        this.setState({ employees: response.data });
      })
      .catch(error => {
        console.log(error);
      });
  }

  render() {
    return (
      <div>
        {this.state.employees.map(employee => (
          <div key={employee.id}>
            <p>{employee.name}</p>
            <p>{employee.email}</p>
          </div>
        ))}
      </div>
    );
  }
}

export default MyComponent;