Are you using SB+ or Websitebuilder? Have you tried an F5 "refresh"? You may have exceeded your page limit? You may have exceeded your storage limit? You can expand your storage limit or delete unused files from you file manager. To see your used and remaining storage space, go to homestead.com and log into your account. Click the Account Summary, under My Account. In the page that opens, you'll see your site stats, including the amount of MB used and remaining.
Sitebuilder+ is what I'm using....I'm running windows 10... I have a business account, pages are unlimited and have tons of space left. yep, I F5'd. I've had Homestead almost 20 years, no problems until now.