Why am I suddenly getting Fluther "Forbidden (403) CSRF verification failed. Request aborted." on my Kindle Fire?

Help! I can’t sign on to Fluther. The Kindle Fire used to work just fine. I’ve cleared cache , reentered log-in name and password. Restarted it. I just can’t use it for Fluther.

I get this note displayed below the error message.
“More information is available with DEBUG=True”