WordPress-page disappeared

In a WP multisite one wp-page has disappeared in one of the subdomain sites. I visited the page in the end of april without any problem. Today I can′t find the page in admin. I have no idea why the page is missing. Since I saw the page last time WordPress has been updated. Can this be the reason why the page has disappeared? What else could it be due to?

• This topic was modified 3 years, 5 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]