Ensure that you have installed the cryptography module in your Python environment. You can do this by running the following command in your terminal or command prompt

Check that you are using the correct version of Python. Cryptography requires Python 2.7 or 3.4+.

Verify that you are importing the module correctly in your code. The correct syntax for importing the cryptography module 

 Double-check your spelling and capitalization. Python is case-sensitive, so make sure that you are using the correct casing when importing the module.

 Check that you are not using a virtual environment without first activating it.

Ensure that you have installed all the required dependencies for the cryptography module. You can find a list of dependencies on the cryptography documentation.

Try uninstalling and reinstalling the cryptography module.

Check for any conflicts with other modules or packages that may be causing the error

 Make sure that the cryptography module is installed in the same environment as the one where you are running your Python code.

If all else fails, try running your code in a different environment or on a different machine to see if the issue is specific to your local setup.