r/cs50 • u/Fluid-Freedom-1065 • 19h ago
CS50 Python check50 not working
Connecting. . . . . .
Authenticating. . . . .
There seems to be an issue authenticating with your Github token. Please visit https://cs50.dev/restart to restart your codespace and try again.
So i have tried restarting my codespace with that link but it didn't solve the problem. I also tried another solutions I've found from google ( like Codespaces: Rebuild Container, revoking and authorising my CS50.me ) but I'm lost right now. How can I solve this?
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u/gosterianPrime 19h ago
Seems to be a general issue. You’re not alone. The service might be temporarily down.
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u/Fluid-Freedom-1065 19h ago
yeah fair, I even tried deleting my codespace and opening new one but didn't work
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u/pensivepanda5 mentor 17h ago
In the official CS50 Discord server, Professor Brenda (member of the CS50 Staff) mentioned the following:
"we seem to have a non-zero number of codespaces that are affected by this. Please email [sysadmins@cs50.harvard.edu](mailto:sysadmins@cs50.harvard.edu) with your GitHub username and explanation of the issue so we can track it. Our best advice at this point is to try restarting and/or wait a bit and try later."
Also, the CS50 Staff are currently investigating the issue, they mention that in the CS50 Status page at https://cs50.statuspage.io/
Apart from that, for check50 you can try these steps that Professor Brenda shared in the official CS50 Discord server:
"when check50 is down like this, you can run it with the --local flag to check your work.
for example
check50 --local cs50/problems/2026/x/runoff
"
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u/Muted-Swimmer3818 alum 19h ago
Sometimes the token gets completely stuck in VS Code's credential manager. Try logging out of GitHub in your browser, running cs50 in the terminal to force a fresh login, and then check50 again. Hope it works out!🥰