It is a progress bar to show you the progress of your file to be reviewed. Looks like your theme is close to getting reviewed.
It’s most likely your hosting. Magento is a beast to run and requires a fast server.
@rosh1958 My comment wasn’t aimed at you, it was aimed at Envato. The system has been broken for years and they still just direct users with this problem to a knowledgebase article.
Is this problem ever going to be addressed???? 4+ years of the same error threads, Jesus f**king christ!