How can I know where this is used, so I can remove it?

The community member posted about an issue they encountered, where they likely clicked something by mistake and it would take too long to check every component. The comments suggest that even after deleting all components, the error persists. Another community member offered to help by requesting the project to be shared, and provided a link to a GitHub pull request. The discussion indicates that the issue may be related to data from a deleted page that is blocking publishing. The recommended solution is to create a new project and copy-paste the home page content there.