Hello @Callas
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. That is odd that it continually freezes each time I'm wondering here if we may need to reset the connection in order to get it working again. I'll leave steps below on how to do so.
First thing I'll recommend is to save a backup to revert back to just in case. You can find how to do so down below.
https://www.quicken.com/support/how-backup-or-restore-your-quicken-data
Next we'll try deactivating all of the accounts. You can do so by following the article listed down below.
https://www.quicken.com/support/deactivate-online-banking-services-quicken-account
Once all the accounts are deactivated go ahead and follow the article here on reconnecting the accounts.
https://www.quicken.com/support/reactivating-deactivated-account
Once you've had a chance to try this see if you're still continually freezing. If you are we'll see what we can try next,
Thanks,
Quicken Francisco