'Why do I get an error message while adding a html page to Django if I put everything in urls.py and views.py?

I am trying to finish this Django project, but I am having difficulty adding a html page. I added all the necessary code to views.py, urls.py, and base.html, but I am still unable to successfully add the html. I will add screenshots of my files below, if anyone can help.

views.py main.html base.html urls.py error message in terminal (last line)



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