9999 is a script error. You need to let support know.

Resolution for 'amex card login issue: 'keep getting error 9999 when updating my amex card login. Files have not updated in a while. please help.' available: Yes.

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

For more information about resolving issues related to amex card login in Quickbooks/QBO or to get support for the issue 'keep getting error 9999 when updating my amex card login. Files have not updated in a while. please help.', click the link below: