Django DEBUG=False getting server 500 error
Thanks for the answers, I have found the solution, the issue was with html template {% static %} tag.
I had such line 

link rel="shortcut icon" href="{% static 'assets/images/39-1109688-140x140.png' type="image/x-icon' %}"

but the closing %} must be in front of type

link rel="shortcut icon" href="{% static 'assets/images/39-1109688-140x140.png' %}" type="image/x-icon"
I'm getting server error(500) after I set DEBUG to False, both in local and after deploying to Heroku.
Everything is Ok when DEBUG mode is True.
Thanks for help