Thank you for reporting this David. We're looking at it and I think it's fixed in the next release.
Any updates on when this will be released?
We are experiencing the same problem in our upgraded test environment (Episerver 11 update 201) and don´t wan´t to upgrade our production environment until this bug is fixed.
This was resolved in version 11.2.5, released yesterday.
I've been experiencing this issue since mid January. Have not noticed the error after CMS 11.3.3 upgrade.
Our developer and production version is 11.3.3. (updated from 9.12) and we and our customer get this error very often. Very very annoying
Anyway, both servers are win server 2008 r2 and also i'll disable AntiForgeryValidation from pluginmanager, no effect
Every other time the login page (/Util/Login.aspx) is loaded EPiServer 11 adds or removes the antiforgery cookie named __epiXSRF which causes every other login attempt to fail.
Steps to reproduce:
Refreshing the login page should not remove the required antiforgery cookie.
The OnLoad event on EPiServer.UI.Util.Login calls RemoveCookie on every page load but AntiForgeryValidation will only add the cookie if it is missing.
Latest version tested: