Unable to Login to BitBucket

I am unable to login to BitBucket. My username is accepted. When I enter the password—which I am certain is valid—I am not shown an error message. Rather, login appears to succeed, but I am redirected to the Bitbucket home page instead of to my dashboard.

I am managing with an unclosed authenticated session in another browser, but if I lose that, I will be unable to use the system.