I renamed a module, and now I'm getting a 'ModuleNotFoundError'. How do I fix this?

If you've renamed a module, you need to update all import statements that refer to the old module name. Search your project for instances of the old module name and replace them with the new name. Also, if the module is part of a package, you might need to update the package's `__init__.py` file or `setup.py` to reflect the change.