Google Chrome | 71.0.3578.98聽(Official Build)聽(64-bit)聽(cohort: Stable)
OS: Windows

Hey! Thanks for letting me know. Looking into it now
I saw some failed API requests to GitHub, but don't see any right now. Does it still happen for you?
Yes, very much so... :(
I would've sent you more screenshots but they look the same...
Anything I can do to assist?
Okay! I might have a fix, does it work now?
I'm afraid so... :(
Same behaviour, on my PC desktop, on my macbook pro laptop, after restarting everything including the router and trying it out in incognito chrome window only.

Hmm, that's indeed weird. It may be related to the account. Could you send an e-mail to [email protected] so we can discuss it there?
Sure. Thank you Ives.
heys guys, any news about this issue? I'm running into the exact same problem @Ajar-Ajar @CompuIves
@Ajar-Ajar @alemesa Are you still experiencing this?
I have the same problem, It happened after I changed my GitHub Username. Pls Fix
yep still happening for me @lbogdan
I fixed it by changing back to my alternative email, I have two emails (personal && work), and a while back I changed the primary I think that's the issue @crudfunc @Ajar-Ajar
Hmm, these cases occur when both the GitHub username and email change at the same time, in that case we don't have an identifier to fall back on. I think we need to solve this on a case-by-case basis. So if you have an issue with this, please send an e-mail to [email protected] so I'll try to fix it as fast as possible for you 馃槃.
Hi, before opening a new issue, I wonder if you can see this issue. It happens both in Chrome and Opera, I cannot sign in with GitHub. 
I'm having the same problem
I'm getting this problem. Email sent to [email protected].
Same here. it lasts maybe 3month
Still i am facing the same issue, when i try to login it is showing login again and again
I cannot login into codesandbox.io from past 3-4 months with my github login.

@sagarmainkar Please email [email protected] with the email you currently use on GitHub and your prior email address and we can get this updated on our system.
I cannot login into codesandbox.io from past 3-4 months with my github login.
I am getting the same. Tried signing with Google, but it says have to login with GitHub.
I cannot login into codesandbox.io from past 3-4 months with my github login.
I am getting the same. Tried signing with Google, but it says have to login with GitHub.
I tried using incognito mode in chrome, I was able login. I am using 87.0.4280.88.
Most helpful comment
Hmm, that's indeed weird. It may be related to the account. Could you send an e-mail to [email protected] so we can discuss it there?