It’s a script error. ¬†You must report it to QuickBooks.

See below.

https://community.intuit.com/questions/1640087-banking-error-9999-from-wells-fargo-this-has-been-goi…

Resolution for 'accounts have not updated issue: 'I am getting a 9999 error all of a sudden and my accounts have not updated in a good 4 or 5 days, please help me solve this problem. Thanks' available: Yes.

The accounts have not updated issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the accounts have not updated issue yourself by looking for a resolution described in the article. If it is a complex accounts have not updated issue or you are unable to solve the issue, you may contact us by clicking here or by using other accounts have not updated support options.

For more information about resolving issues related to accounts have not updated in Quickbooks/QBO or to get support for the issue 'I am getting a 9999 error all of a sudden and my accounts have not updated in a good 4 or 5 days, please help me solve this problem. Thanks', click the link below: