error when refreshing emby server webpage

[kodibart 0]

Although all the fanart and poster.jpg files were downloaded long ago some tv shows don't show them. I tried to refresh the firefox webpages and I got this error

Error (FileNotFoundException): Could not find file "/Applications/Emby.Server.Mac.app/Contents/Resources/dashboard-ui/dlg1469806096369".Handler for Request not found (404):  Request.HttpMethod: GET  Request.PathInfo: /web/dlg1469806096369  Request.QueryString: System.Collections.Specialized.NameValueCollection  Request.RawUrl: /web/dlg1469806096369