Try generating a WindowsUpdate.log to get a meaning for that code. All we know is that it is undocumented but in fact I suspect it may be in an entirely new category.
https://docs.microsoft.com/en-us/windows/deployment/update/windows-update-error-reference
| 0x8024A005 | WU_E_AU_NO_REGISTERED_SERVICE | No unmanaged service is registered with AU. |
|---|---|---|
| 0x8024AFFF | WU_E_AU_UNEXPECTED | An Automatic Updates error not covered by another WU_E_AU * code. |
Another potential source of clues is Logs\MoSetup\UpdateAgent.log
HTH
Robert Aldwinckle