Tokens

I am just setting up my Smart FTP. I keep getting the following:

SSL/TLS client handshake failed (Error = 0x80090308).
[14:19:51] Cannot login waiting to retry (30s)...
[14:19:51] The token supplied to the function is invalid

What is a token?
How do I correct error 0x80090308
What can I do to get past this?