Quicken Unable to Connect/Update E*Trade

My "Quicken E*TRADE" connection stopped working after a very long time of no issues. I was getting a "Password wrong - is it a typo?'" message repeatedly when trying to reconnect. The password was correct (worked fine in my Browser).

I updated to the most recent software on my Mac just now and tried again, but it's still not working.

This time it's a different message:

An unexpected error occurred.

Please try again later.

OFX Error: 16503

Any suggestions?

Thanks!