QB Issue Resolution:

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 Issue 'I have accounts with Capital One and Suntrust and both accounts stopped downloading transactions on the same day, with a generic 9999 error. Any ideas why and how to fix' available: Yes (Solved).
Source: Intuit Community forum.

I have accounts with Capital One and Suntrust and both accounts stopped downloading transactions on the same day, with a generic 9999 error. Any ideas why and how to fix: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for 9999 error
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Error Recovery for 9999 error [Canada]
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