The intended audience for this article is Agents.

Solution: CSRF token mismatch tends to be fixed by a page refresh. Try refreshing the page or starting over. If that does not solve the CSRF token mismatch, try logging in with a private or "incognito" browser window. If a private window works, then clearing cookies/cache should fix the CSRF token mismatch.

Probable Cause: The browser tab may have been left open for a long time until the token to expire. (Security measure).