problems with the extension

Hi, there is a script that works fine, but I tried to turn it into a gpt chat extension. the icon appeared, but nothing happens when clicked, what am I doing wrong? I have attached an archive with the project https://drive.google.com/file/d/1GNcB3XqBLHxPiK_cMeEQPMiaz1_3NshP/view?usp=sharing