Mobo01

Hi everybody, I joined this group to learn more about web development. And I'm facing some issue! Can somebody help me? After deploying and hosting my website, I upgraded my pip version. Then I installed the pypaystack package. When I try to push to Heroku, I get the error shown below. In the development stage, the project is running smoothly. What can be the issue? I even created a new virtual environment but the error remains. I'm hoping that this community will assist me on my path. Thanks!