What is the problem?
If I try to login to beta cluster, I see the error message:
There seems to be a problem with your login session; this action has been canceled as a precaution against session hijacking. Please resubmit the form.
I have tried clearing my cookies, using different browsers, even using Browserstack emulator.
I cannot reproduce this on my local environment, which is the same MediaWiki version as beta.
Steps to reproduce problem
- Go to https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Special:UserLogin
- Attempt to login
Browser: Firefox, Chromium, Safari
Wiki(s): MediaWiki 1.36.0-alpha (a01f759) 06:56, 23 September 2020