Recently I had an issue with logging in to my support agent account on our subdomain.
Error message "Forbidden - Invalid authenticity token"
No reset of password was possible at all.
Cause: Zendesk login requires 3rd party cookies to be allowed.
Solution: Either - allow third party cookies OR make 3rd party cookie exceptions as below.
Chrome - 3rd party cookie settings.
- Chrome Settings
- Search for Cookies
- Click on "Cookies and other site data"
- Scroll past the general settings and find "Customised behaviors"
Refresh your page, and log in!