BE0069: The project's RootContentContainer property value '[ID]' must be associated with a topic in your project
Error BE0069: The project's root content container topic (ID=[ID]) must have its Visible property set to False in the content layout file.
Cause
You specified a root content container topic for MS Help Viewer output but the topic's Visible property is not set to False in the content layout file.
Solution
When creating MS Help Viewer output, your project's conceptual and API content can be parented to an automatically created root container node associated with a conceptual content topic defined within your project. The given topic must have its Visible property set to False in the content layout file so that it does not appear in the table of contents generated by the help file builder. If your intent is to parent the content to a topic inside of your project, use the content layout file's API insertion point option instead which is intended for that purpose.