Log Out and Log Back In: Sometimes, simply logging out of the app and logging back in can resolve sync issues.
Update the App: Ensure you have the latest version of the Quicken mobile app.
Check Server Status: Visit Quicken’s status page to see if there are any ongoing issues with their servers.
https://www.ssplace.miami.edu/blog/troubleshooting-common-quicken-errors-a-comprehensive-guide