Finding Scores Stored Online

I am unable to find and download a score. It appears on my computer with the little cloud symbol at the bottom corner; and when I click on the cloud icon to download it I get this message window: An ! in a triangle, and the text, "Your score could not be opened. This score is invalid." It's somewhere as it shows up in the Musescore application on my iMac desktop computer. Can you help?!