The standard advice for this problem is:
1. For safety: always save your score locally on your own computer, then close the score
2. Wait for a while, then open the score again and try to save online (either Save to cloud or Publish to MuseScore.com)
Comments
The standard advice for this problem is:
1. For safety: always save your score locally on your own computer, then close the score
2. Wait for a while, then open the score again and try to save online (either Save to cloud or Publish to MuseScore.com)