Score Won't Publish

Hi. I just started working on MuseScore yesterday, and so I'm not completely familiar with everything yet. I've been tinkering around and trying things out, discovering how to use everything. Today I decided to try and create my first score. I've been working for most of the morning, and I just finished. I'm pretty confident in it, and I was hoping to publish it on MuseScore. I was able to upload it to my iCloud, but when I tried publishing it, all I got was a disappointing 'Your Score Could Not Be Published'. I'm not sure if this is my computer, wifi, or just the MuseScore app, but I just wanted to know what was happening and if there' anyway to fix it and publish my score. Thanks.