Describe the Web publishing process and any 3rd party software optionally involved in it.

In the standard configuration, one or more workflows perform the Web publishing and are executed as background tasks that you can monitor in EdAdmin4.

All the errors related to GN4 will be shown in the background tasks log. If the content export towards Web CMS was successful, but the problem is on the Web CMS side, the related questions are to be sent to the support for that CMS.