I put in items adding this code:
SPUtility.Redirect("http://gzawistowskilap/SitePages/Event.aspx", SPRedirectFlags.Trusted, current);
If I try to add something a error shows:
The Ribbon Tab with id: "Ribbon.Read" has not been made available for this page or does not exist. Use Ribbon.MakeTabAvailable().
I Only wont to refresh site
Here its screen of error: