ModuleNotFoundError: No module named 'common'

This error message indicates that the Python interpreter could not find a module named "common". This could happen for several reasons:

1. The module "common" is not installed on your system. You can try installing it using a package manager like pip or conda.

2. The module "common" is not in your Python path. You can check your Python path by running the following code:

   import sys
   print(sys.path)

This will print a list of directories where Python looks for modules. If the directory containing "common" is not in this list, you can add it using the following code:

   import sys
   sys.path.append('/path/to/common')

Replace "/path/to/common" with the actual path to the directory containing the "common" module.

3. The module "common" is in a subdirectory of your project, but you are not importing it correctly. Make sure you are using the correct import statement, e.g.:

   from myproject.common import mymodule

Replace "myproject" and "mymodule" with the actual names of your project and module.