If you have had a Spire Server Administration login browser window open for a period of time, you may get the message that the CSRF token has expired and are unable to login.
To resolve this there are a couple options to try.
1. Press CTRL + F5 on your keyboard to reload the webpage.
2. Close the browser window and open a new one and go to Spire Server Admin.
Either of the above steps should resolve this issue and allow successful login.