I'm very, very new to AE. So I purchased and downloaded this template- http://www.wavebreakmedia.com/stock-photo-video-footage-p-193304/Openi ng-Doors--AE-Version-4.html
And as soon as I opened it in AE CC it looked like this- 
the background and the images of the door aren't showing up. What do those funky colors mean? Is it that those files are missing or something?