Spyder 4 wont launch

[DrBwts]

As the title says Spyder 4 wont launch. The initial slpash screen comes up then it just dies.

I have tried spyder --reset in the Anaconda terminal but the problem persists.

Nic

[SP-XIII]

Same for me.

Python3.8 W10 pip install spyder==4 --pre -U

[Pablo Bleyer]

 It's the freaking tornado that still has not been updated properly with the asyncio updates in Windows.

Add the following in the imports section to the asyncio.py file in the tornado distribution ({Python}/Lib/site-packages/tornado/platform/asyncio.py):

---8<---

import sys
if sys.platform == 'win32':
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

---8<---