Spyder无法启动。无法从anaconda提示符下启动

Question

检查所有软件包并升级到最新版本。尝试多次卸载并重新安装均无效。

尝试使用anaconda导航器打开会出现以下错误：

Traceback (most recent call last):
File "C:\Users\USER\Anaconda3\Scripts\spyder-script.py", line 10, in 
sys.exit(main())
File "C:\Users\USER\Anaconda3\lib\site-packages\spyder\app\start.py", line 190, in main
from spyder.app import mainwindow
File "C:\Users\USER\Anaconda3\lib\site-packages\spyder\app\mainwindow.py", line 92, in 
from qtpy import QtWebEngineWidgets # analysis:ignore
File "C:\Users\USER\Anaconda3\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 22, in 
from PyQt5.QtWebEngineWidgets import QWebEnginePage
ValueError: PyCapsule_GetPointer called with incorrect name