Hi there
I am trying to add the european Zones script in to my shop but every time i try to run the script i get this message

WARNING: An Error occurred, please let us know! If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you entered valid data.

This is the plugin i am trying to use in my shop > https://www.zen-cart.com/downloads.php?do=file&id=1177

Does anyone know what i can do to fix this issue please?


Thank you