It appears that Intuit is having a bit of trouble with the audit log and users.

Did you create a user with the same name?

Resolution for 'audit log and users issue: 'adding accountant error' available: Yes.

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

For more information about resolving issues related to audit log and users in Quickbooks/QBO or to get support for the issue 'adding accountant error', click the link below: