Connection error while logging in to the Quicken account is a problem that may or may not be frequently encountered by users. Basically, different users have different experiences and the reason behind for that if facing different kinds of errors. So, different errors can lead to the same consequences, thus it is important to find root cause of error for effective troubleshooting measures. Connection error for Quicken happens mainly due to internet problems or internal server error of Quicken. Both of them considered as minor issues, as they get resolved automatically after some time. If problem seems to be happening due to other unknown errors, call tech support team for assistance.