Why isn't iMovie adding pictures or titles to a new project and how can you fix this?

If iMovie isn't adding pictures or titles to a new project, it could be due to insufficient permissions, a software glitch, or a lack of available storage. To fix this, try restarting iMovie and your device, ensuring that you have the latest version of the software installed, and checking that you have enough storage space. Additionally, verify that iMovie has the necessary permissions to access your photos in your device settings. If the problem persists, consider reinstalling the app.