message: Illegal Operation: {0} err code: QCS-0403-2

Question

How do I fix this error

UKR · Accepted Answer

Try to Reset Sync so
that the current cloud sync file is replaced with a fresh complete copy

Do note that a full Sync process may take many minutes to complete.

Log out of your
mobile app, then do this on your desktop / laptop:

How to reset Sync to Cloud

* Go to Edit / Preferences /
     Quicken ID, Sync & Alerts
* Under the "Mobile and
     Web" group to the right, if present, click the "Reset your cloud
     data" link and follow the instructions until it is complete.

Also see https://www.quicken.com/support/troubleshooting-quicken-mobile-companion-app

and https://community.quicken.com/discussion/7856172/faq-common-mobile-web-sync-errors-and-solutions#latest