Score won't save online

I downloaded the updated version of musescore, and started a new score. I tried saving it to my computer, but it wouldn't work, so I uploaded it online with no problem. However, every time I try to save my progress to the cloud, the app says there's an authentication error and it won't save to the cloud. Does anyone else have this problem? How can I make sure my score is safe and I won't lose my progress??