My question seems to be related to this one, but my problem is worse, because Spyder 5 is not starting at all. Perhaps because it's running on Mac Os?
When running /Library/Frameworks/Python.framework/Versions/3.9/bin/spyder &, the splash screen briefly appears, then disappears again, and I get the error message:
MacIgor:~ igor$ No QCoreApplication instance found. Application patches not applied. You have to call load_stylesheet function after instantiation of QApplication to take effect.
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.9/bin/spyder", line 8, in <module>
sys.exit(main())
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/app/start.py", line 213, in main
mainwindow.main(options, args)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 2293, in main
mainwindow = create_window(app, splash, options, args)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 2155, in create_window
main.pre_visible_setup()
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 1186, in pre_visible_setup
plugin_instance.before_mainwindow_visible()
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/plugin.py", line 133, in before_mainwindow_visible
self.setup_layout(default=False)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/plugin.py", line 237, in setup_layout
self.set_window_settings(*settings)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/plugin.py", line 435, in set_window_settings
self.setup_layout(default=True)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/plugin.py", line 210, in setup_layout
self.setup_default_layouts('default', settings)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/plugin.py", line 276, in setup_default_layouts
layout.set_main_window_layout(self.main, self.get_dockable_plugins())
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/layout/api.py", line 381, in set_main_window_layout
plugin.toggle_view(area["visible"])
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/ipythonconsole/plugin.py", line 508, in toggle_view
self.create_new_client(give_focus=False)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/ipythonconsole/plugin.py", line 1007, in create_new_client
self.connect_client_to_kernel(client, is_cython=is_cython,
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/ipythonconsole/plugin.py", line 1041, in connect_client_to_kernel
km, kc = self.create_kernel_manager_and_kernel_client(
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/spyder/plugins/ipythonconsole/plugin.py", line 1506, in create_kernel_manager_and_kernel_client
kernel_client.hb_channel.time_to_dead = 25.0
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/jupyter_client/client.py", line 364, in hb_channel
self._hb_channel = self.hb_channel_class(self.context, self.session, url)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/qtconsole/util.py", line 64, in __new__
QClass.__init__(inst)
TypeError: __init__() missing 1 required positional argument: 'context'
I have used Spyder 4.* and Python 3.* before without problems, on Mac OS High Sierra. The problems started today after upgrading Python to 3.9.4 (used to be 3.7.7) and Spyder to 5.
Is there a workaround, is there anything else I should check/update?