my background image will not load in Twine 2.0.11, Harlowe (on my Mac OS El Capitan)

Hi there,

I am having problems with Twine 2.0.11 Harlowe story format. The background image is not loading. I did not have this problem with Twine 2.0.2. I have tried so many different variations, including single quotations, have scoured the web over CSS solutions, and nothing works.

I have the Twine app in the same folder as another folder called "images" ,which is why I have the path directory below. The image in question is a jpg. I have tried other images too, and that doesn't work either.

My code is the following:

body {
background-image: url("images/alien.jpg");
background-size: 100%;
background-repeat: no repeat;
}
tw-story {
font-family: 'Arial', monospace;
color:#ff0000;
font-size: 2.0em;
}


Thank you for your help.