Clicking Save looks OK
After logging in, attempt to set beta settings.
After clicking Save, get message "Error saving settings. Please make sure that you have cookies enabled"
This causes test failures such as https://integration.wikimedia.org/ci/view/BrowserTests/job/browsertests-MobileFrontend-en.m.wikipedia.beta.wmflabs.org-linux-firefox-sauce/36/testReport/(root)/VisualEditor/Going_back_from_save_screen_in_VisualEditor/
This is probably a problem in core, and very likely related to the VE bug https://bugzilla.wikimedia.org/show_bug.cgi?id=65709
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=65709
Attached: