Why won't the "Unlock Keyring" window go away?

I'm running Ubuntu 16.04.2 LTS and whenever I'm logged in, I get this window:

I type in my password, and it disappears and comes back a second later. After ten attempts at typing in my password, it finally goes away. I tried pressing cancel, but its the same result. I wouldn't mind so much if it didn't take away focus from other windows. When I open Chrome, I am typing a URL to visit, and the "Unlock Keyring" window pops up again and won't let me do anything until I manage to get rid of it. How can I keep this thing away?