Start by examining the plugin's photo generation code in the repository, likely in a file related to image sources or the 'Photos' menu. Look for recent commits or issues that might explain the removal of the 'Nature' category. Since the user asks about connecting to an external API, explore whether the plugin currently uses local assets or third party services like Unsplash; consider integrating a royalty free image API as a feature addition.
New version, no Photos > Nature · timuric/Content-generator-sketch-plugin#87 | Good First Issue