Can you post a screenshot of your script?
I think the background is it issue because there doesn’t seem to be anything else that’s wrong. There should be a space between INT. and CLOUD. You may not have gotten an error when uploading it, but I think the script doesn’t recognize it as a background because it identifies it as just one word, so you can’t use the background. Reupload it and make sure to name it INT. CLOUD with a space. Then it should work.