在用户界面预览，运行时报如下错误，该怎么解决

OSError: Tunnel connection failed: 403 Forbidden

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/urllib3/connectionpool.py", line 662, in urlopen
    self._prepare_proxy(conn)
  File "/usr/local/lib/python3.9/dist-packages/urllib3/connectionpool.py", line 948, in _prepare_proxy
    conn.connect()
  File "/usr/local/lib/python3.9/dist-packages/urllib3/connection.py", line 308, in connect
    self._tunnel()
  File "/usr/lib/python3.9/http/client.py", line 904, in _tunnel
    raise OSError("Tunnel connection failed: %d %s" % (code, message.strip()))

During handling of the above exception, another exception occurred:

MaxRetryError: HTTPSConnectionPool(host='lf6-bot-platform-tos-sign.coze.cn', port=443): Max retries exceeded with url: /bot-studio-bot-platform/bot_files/3041683572800931/application/vnd.ms-excel/7483794987202166811/2.20.xls?lk3s=50ccb0c5&x-expires=1743061708&x-signature=AxPVg%2BMuVAu%2BHcBLAqGoxKspSxQ%3D&x-wf-file_name=2.20.xls (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 403 Forbidden')))

During handling of the above exception, another exception occurred:

ProxyError: HTTPSConnectionPool(host='lf6-bot-platform-tos-sign.coze.cn', port=443): Max retries exceeded with url: /bot-studio-bot-platform/bot_files/3041683572800931/application/vnd.ms-excel/7483794987202166811/2.20.xls?lk3s=50ccb0c5&x-expires=1743061708&x-signature=AxPVg%2BMuVAu%2BHcBLAqGoxKspSxQ%3D&x-wf-file_name=2.20.xls (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 403 Forbidden')))

Exception: 处理Excel文件失败：HTTPSConnectionPool(host='lf6-bot-platform-tos-sign.coze.cn', port=443): Max retries exceeded with url: /bot-studio-bot-platform/bot_files/3041683572800931/application/vnd.ms-excel/7483794987202166811/2.20.xls?lk3s=50ccb0c5&x-expires=1743061708&x-signature=AxPVg%2BMuVAu%2BHcBLAqGoxKspSxQ%3D&x-wf-file_name=2.20.xls (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 403 Forbidden')))