Quicken R33.24 no longer updating Cobalt Credit Union accounts

I am using Quicken for Windows 10, release R33.24. Until now, it has been updating my accounts with Cobalt Credit Union with no problem. For the last few days, it is no longer doing so. The Update progress window shows the usual upload/download arrows while the update is running, but the Update summary window doesn't even show the Cobalt accounts, as if the update wasn't even done. I've tried resetting and deactivating/reactivating the account, but nothing helps. Can anyone help? Thank you.