Can't set up online banking: "Secret" error

I'm a new MoneyDance user... potential convert, I guess I'd say. I've been using Quicken for Mac for more than 20 years and am tired of its problems. I downloaded the MD trial and imported my Quicken data. It took me about 8 hours of work to fix errors in the imported data... I am thinking some weird corruption in the Quicken data, or some kind of conversion problem. There were lots of duplicate transactions on the MD side but finally I've worked all of that out.

Now I'm trying to figure out the online banking functions. But when I go to Online Banking Signup and click New Connection and then select a bank (Citi Cards, in this case, since I thought I'd try downloading credit card transactions) I get the following error dialog: Error: javax.net.ssl.SSLKeyException: RSA premaster secret error

I can't get any further. Any insight on this "secret" error?