If dragging the ZIP does not start installation, use Blender Preferences to install or enable the extension from the original ZIP. Confirm that you are using Blender 4.2 or later and that the Camera Controller tab appears in a 3D Viewport sidebar.
If the panel shows Installing Dependencies, wait for progress to finish and keep Blender open. Do not start streaming until it completes. If a module reports an error, restart Blender, verify internet access, and try the dependency/streaming reload action when available.
Use the current official ZIP, enable the add-on again, and avoid deleting unrelated Blender preferences or Python folders. If installation still fails, include the Blender version and visible dependency message in a Support request.
Return to Install the Blender Add-on for the normal workflow.