Right now there is an issue with online banking importing:  https://www.artesanibookkeeping.com/error-9999-quickbooks-online/

Resolution for 'banking importing issue: 'Never mind. I do not want help from a public forum' available: Yes.

The banking importing 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 banking importing issue yourself by looking for a resolution described in the article. If it is a complex banking importing issue or you are unable to solve the issue, you may contact us by clicking here or by using other banking importing support options.

For more information about resolving issues related to banking importing in Quickbooks/QBO or to get support for the issue 'Never mind. I do not want help from a public forum', click the link below: