When QuickBooks Error code 9997 appears, QuickBooks Online fails to connect with your bank to display the latest transactions. It is a common scripting error and can sometimes be fixed by just clearing cache and cookies from the internet browsing history. This error code can also be fixed by updating bank feeds manually, by clicking on the Update while logging-in using a Private or Incognito window in your preferred browser. 

https://www.hostdocket.com/quickbooks-error-9997/