使用yfinance获取数据后Plotly蜡烛图无显示的问题求助

我现在尝试用yfinance获取OHLCV数据，再用Plotly绘制一个简单的蜡烛图，但遇到了麻烦：数据能正常下载成功，可最终生成的图表上完全看不到任何蜡烛。

以下是我编写的代码：

import yfinance as yf
import pandas as pd
import plotly.graph_objects as go
from datetime import datetime

tf = '1d'  # Time frame (daily)
asset = 'AAPL'  # Asset ticker (e.g., Apple)
start = '2019-01-01'  # Start date
end = datetime.now().strftime('%Y-%m-%d')  # End date is current date

df = yf.download(asset, start=start, end=end, interval=tf)

df['pct_chg'] = df['Close'].pct_change() * 100

df.index.name = 'timestamp'

# now plot the chart

hover_text = [f"Open: {open}<br>Close: {close}<br>Pct: {pct_chg:.2f}%" for open, close, pct_chg in zip(df['Open'], df['Close'], df['pct_chg'])]

# Create a candlestick chart using Plotly
fig = go.Figure(data=[go.Candlestick(
        x=df.index,
        open=df['Open'],
        high=df['High'],
        low=df['Low'],
        close=df['Close'],
        hovertext=hover_text,
        hoverinfo='text'
    )])

# Update layout
fig.update_layout(
        title='Candlestick chart',
        xaxis_title='Date',
        yaxis_title='Price',
        xaxis_rangeslider_visible=False,
        template='plotly_dark')

# Show the plot
fig.show()

我已经确认数据是正确下载到的，但就是图表上没有蜡烛显示，有没有大佬能帮我排查下问题出在哪里？

备注：内容来源于stack exchange，提问作者soo