Page not found error with debug toolbar displayed

After running the server from my VScode terminal, I get a Page not found error while the debug toolbar panel was displayed by the side of the screen. However, when I added /playground/hello i.e, this displayed Hello Mosh but without the debug toolbar panel. I really want Hello Mosh to be displayed alongside the debug toolbar panel.
This problem is holding me back from progressing with my Manager and Queryset lesson in Ultimate Django Series 1
Please I need your assistance.

I have finally seen the reason why toolbar panel didn’t show up alongside Hello Mosh on my screen after running the server. My html body element in the hello.html file had a slash(/) missing in the second part, that is, instead of typing </body, I had just body>. That was the error.
Now I am good and back.