django-contact-form | Contact form application for Django | Form library

Im stuck my django blog project.

I create a standart blog but i have a problem now. When i add in navbar some categorys in all post i see this post index page. But when i go another page (like contact form) navbar post links are disappear.

let me explain; i create three article and i add this articles in "Music" category

after then i use this code in my navbar;

I have a form that isn't rendering and I can't figure out why. The only thing showing is submit button. I created the form having followed the methodology described here, here and here.

I looked at solutions for the problem (listed below amongst others) but they havent helped.

django-forms not rendering errors

django form not rendering in template. Input fields doesn't shows up

Django Form not rendering

Django Form not rendering - following documentation

The html is app_core/index.html which extends another- landing_page/base.html

The html:

I need to embed a contact form at the bottom of my homepage, which is a single page application. I followed several tutorials on how to create my own contact form on another page (e.g., myportfolio.com/contact) which were successful. Unfortunately I haven't been able to adapt those results or find other tutorials on how to make that contact form visible and functional on the same page all of my other model data is displayed (e.g., myportfolio.com).

I followed this tutorial: https://atsoftware.de/2015/02/django-contact-form-full-tutorial-custom-example-in-django-1-7. I've only created one application.

I feel like this should be a very common thing to want to do, which makes me think I'm overlooking something glaringly obvious.

views.py in application