There is currently a rampant error 9999 scripting error that Intuit is working on. See:
Resolution for 'account all day issue: 'Haven’t been able to update account all day' available: Yes.
The account all day 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 account all day issue yourself by looking for a resolution described in the article. If it is a complex account all day issue or you are unable to solve the issue, you may contact us by clicking here or by using other account all day support options.
For more information about resolving issues related to account all day in Quickbooks/QBO or to get support for the issue 'Haven’t been able to update account all day', click the link below: