You can’t just restore one page from the Site History. You restore to a previous working version and then add the new page again. Or clone your site, get the working version on your original site, and then copy the original my-acc page to the new cloned site.
I mportant: You have errors in your code that need to be fixed. I doubt that going back to an old version will help. These errors will need to be fixed whatever you do.
If you need further details or clarification, I would recommend contacting Wix Customer Care , as they will be better able to handle your problem.