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.