Thanks! I followed your link and ended up switching bank feeds to classic mode. There, I get an OL-204 error message instead of the window just closing with no explanation. Digging deeper, it appears that Chase (and many other financial institutions) no longer supports Internet Explorer 11, which is what QB uses to connect. They cite security reasons for the discontinued support, so that makes me question why QB is still tied only to this outdated and insecure program...

I could manually download and import the files like I do for my other accounts, but QB won't let me edit any settings or do this until I complete the failed attempt to connect. It will never connect since Chase no longer supports IE 11, and QB only supports IE 11. Quite the ridiculous problem to be having. 

Is there any way to disable bank feeds or change them for this account without having to complete the failed attempt to connect?