I have been editing a colleague's page, and finding that I had to flip between the published version and my unpublished, edited version, to insert comments on sections of text (I was also commenting in-line in colored text during edits). After I commented on something, I flipped back to edit mode and got this error. Being new to Confluence, I hit refresh, thinking that because I had not actually said to save anything, that this might be like a "restart" on the page. Instead, it appears to have deleted all content.
This was easily 1-2 hours worth of work. Is there a way to recover this? The page is currently wholly unresponsive to me and only shows me this anytime I load it, from anywhere: