Thanks for reaching out to the QuickBooks Community. How are you today? I hope all is well.
I see that you said you uninstalled and reinstalled the app. Are you referring to the mobile app?
When we encounter these errors it's important to clear the data from storage, then reinstall. Here are some quick steps to fix most app-related issues:
Change the Wifi data connection on your device to 4G (varies by device).
Close and restart the app.
Clear app data. To do this:
Open your device Settings.
select Apps (varies by device).
Choose QuickBooks app from the list, then select Storage.
Select clear data.
Power down and restart your device.
Uninstall and reinstall the app.
That should do the trick. If you are still having issues, I recommend reaching out to our Technical Support Team. This way, one of our agents can review your account in a secure environment and investigate this matter further. You can use the link I'm including below to connect with our Team directly.