在Anaconda prompt中直接输入spyder，报错如下

Traceback (most recent call last):

File "C:\Users\user\.conda\envs\KB\Scripts\spyder-script.py", line 10, in 
sys.exit(main())

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\app\start.py", line 214, in main
mainwindow.main(options, args)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\app\mainwindow.py", line 2293, in main
mainwindow = create_window(app, splash, options, args)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\app\mainwindow.py", line 2146, in create_window
main.setup()

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\app\mainwindow.py", line 882, in setup
plugin_instance = plugin_class(self, configuration=CONF)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\api\plugins.py", line 1425, in __init__
widget.set_icon(self.get_icon())

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\plugins\profiler\plugin.py", line 70, in get_icon
return self.create_icon('profiler')

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\api\plugins.py", line 1136, in create_icon
return ima.icon(name)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\spyder\utils\icon_manager.py", line 380, in icon
return qta.icon(*args, **kwargs)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\__init__.py", line 146, in icon
return _instance().icon(*names, **kwargs)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 305, in icon
names[i]))

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 353, in _parse_options
prefix, chars = self._get_prefix_chars(names)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 384, in _get_prefix_chars
raise Exception(error)

Exception: Invalid icon name "timer-outline" in font "mdi"

尝试了一万个方法，什么重新卸载spyder（uninstall spyder）然后重新安装。以及很多人使用了spyder --reset就可载入了。

1、https://stackoverflow.com/questions/67330450/sypder-5-0-1-fails-to-load

2、https://blog.csdn.net/lad_z/article/details/123202705

3、https://blog.csdn.net/weixin_45870475/article/details/118492394

4、https://www.zhihu.com/question/68785387/answer/3287188573

https://blog.csdn.net/mzm123321/article/details/125336592

这些尝试始终不能解决该问题。对于该问题，只能对症下药，我们能够注意到

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\__init__.py", line 146, in icon
return _instance().icon(*names, **kwargs)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 305, in icon
names[i]))

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 353, in _parse_options
prefix, chars = self._get_prefix_chars(names)

File "C:\Users\user\.conda\envs\KB\lib\site-packages\qtawesome\iconic_font.py", line 384, in _get_prefix_chars
raise Exception(error)

Exception: Invalid icon name "timer-outline" in font "mdi"

猜测应该是这个包qtawesome出现了问题，通过将该问题复制到外网，在stackoverflow确实发现了相同的报错问题。

See https://stackoverflow.com/questions/67114637/why-spyder-5-0-0-application-launch-error-when-launching-from-user-defined-envir.

直接使用命令

conda install qtawesome=1.0.2

重新安装qtawesome该库即可进入spyder了。