There is currently a rampant error 9999 scripting error that Intuit is working on.  See:

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

Resolution for 'been able to update issue: 'Haven’t been able to update account all day' available: Yes.

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

For more information about resolving issues related to been able to update in Quickbooks/QBO or to get support for the issue 'Haven’t been able to update account all day', click the link below: