Trying to Create Sample HTML5 game but get blank screen.

How do I...?
1

I start up GDevelop.
Create New Game.
Platform : Web Platform - Empty Project.
I go to the New Scene.
And I make a simple change. I Edit the properties of the background color to RED.
My new scene now is RED. I can see it. Duh…
Now I click Preview - FOR HTML5
Now instead of me seeing my FANCY RED scene I GET a drab gray scene from my Chrome Browser.

and this is a console screen screen.

I am using the Ubuntu(15.10). I installed from PPA.

A little help please ? I tried following the simple tutorials but nothing but this drab gray screen is my output.

2

Have you tried clearing the cache (ctrl + f5 on most browsers)?

3

thank you. i feel very “newbie-ish”.