It's possible that you are not passing the :id param in your route, which is why the route is not matched, since :id is required.
I got the same error as well. But the reason is the little mistake that in the view page I write which I less the last 's' of 'sessions'.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.