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There is no one-size-fits-all solution to this error message as it may be caused by various issues. Some potential solutions include:

1. Making sure that the necessary dependencies and libraries are properly installed and up-to-date.

2. Ensuring that the DragSource and DropTarget components are properly initialized and registered.

3. Checking for any conflicts or issues with other components or modules that may be interfering with the Drag and Drop functionality.

4. Debugging the code to trace the source of the error and identify any specific issues that may be causing the problem.

5. Seeking help from the community or support team for the specific technology or platform being used to develop the application.