Hello @Muhammad_Hamzah,
Open the lab from Coursera again, follow the steps in method 2 in this link. Then you will be able to download the lab and all public files provided by the course, including the lab_utils_uni.py.
Next time, you do not need to copy and paste the code into your local jupyter notebook. Instead, follow the above steps to download the whole file structure. The structure makes sure the correct relative locations between files.
Lastly, I recommend you to run all labs on Cousera. Many learners have their own reasons of running the labs in their own environment, but the thing is, the labs are designed to run on Cousera, so if something is not running in your local environment and you do not know how to fix it, you might need to do the labs back on Cousera.
Cheers,
Raymond