What should be done if a Salesforce administrator cannot upload custom geoJSON files via the UI?

The correct answer involves adding the system permission "Manage Analytics Custom Maps" to the permission set used by the Salesforce administrator. This permission is crucial because it grants the necessary access for performing operations related to custom maps, including the capability to upload geoJSON files.

When this permission is assigned, it allows the administrator to utilize specific features within the Salesforce platform related to custom maps. Without this permission, even if an administrator attempts to upload custom geoJSON files, they might face restrictions or errors that prevent them from completing the action. This setup ensures that only users with the appropriate permissions can manage and make alterations to analytics components that might affect different aspects of data visualization and mapping capabilities in the organization.

The other options highlight valid considerations but do not directly address the specific needs for resolving the issue of uploading custom geoJSON files through the UI. For example, enabling custom maps with geoJSON in the analytics settings is necessary but assumes the administrator already has the correct permissions. Additionally, uploading via the API could be a workaround but is not applicable when the direct functionality should be available through the UI with the proper permissions. Contacting Salesforce support could also provide assistance, but the situation can often be resolved internally through adjusting user permissions.