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It looks like, from your post, that your home.html.erb template file is in the wrong place. There should be a folder called static_pages inside app/views. So inside app/views/static_pages/ is where your home.html.erb file should be. Your code says it is inside the layouts folder. Move it and it will work.

So, specifically, either create the folder static_pages (if it does not exist) or move you home.html.erb file into the app/views/static_pages/ folder.

Just and FYI, if your other views (contact, about, etc) are in the layout folder move them into static_pages too. But leave the layout file in there.

Since you are a beginner I'll explain this a little more. When you set your routes you are telling rails where to find the files. So when you write something like get '/help', to: 'static_pages#help what you telling rails is when the URL /help is viewed serve up the file help.html.erb in the static_pages folder and it knows to look inside the app/views folder by configuration. If you wanted to keep home.html.erb where it is, you could just change you routes to root 'layouts#home' and it should work, but since the view file is not a layout file that would not be the best solution. Hope this helps.