Error message: Object reference not set to an instance of an object.

Url: https://www.worldpartytraveller.com/skin.aspx?lang=el&itemtype=Article&itemalias=destinations-&action=view&f368EB1F9=09DF6F64,E7FBA0B4,E2F7E6FF,A6AFA7B0,4C66BA0D,7AF4DC2C,9D5CD68B,8E856FA2,402C929A

Message: Object reference not set to an instance of an object.

   at Cms.LinkScope.<>c.b__9_0(Link l) in C:\Bone\Cms\src\DBItems\LinkScope\LinkScope.cs:line 42
   at Bone.DBList`1.FindAll(Predicate`1 match) in C:\Bone\Bone\src\EngineDB\DBList.cs:line 105
   at Cms.LinkScope.get_RootLinks() in C:\Bone\Cms\src\DBItems\LinkScope\LinkScope.cs:line 42
   at ASP.tpl_footerarea_tpl_ascx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\inetpub\worldparty\tpl\FooterArea.tpl.ascx:line 62
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   at Bone.BONE.LoadControl(String virtual_path, DBItem item, Boolean cache, Boolean hide_debug_sign, Object[] objects, String default_if_file_no_exists) in C:\Bone\Bone\src\BONE.cs:line 3173
   at Bone.BONE.LoadControl(String virtual_path, DBItem item, Boolean cache) in C:\Bone\Bone\src\BONE.cs:line 3024
   at ASP.skin_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\inetpub\worldparty\skin.aspx:line 251
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Page.Render(HtmlTextWriter writer)
   at Bone.Asp.RenderSkin(TextWriter w) in C:\Bone\Bone\src\Classes\Asp.cs:line 71
   at Bone.ModalAction.RenderPage(TextWriter w) in C:\Bone\Bone\src\Actions\Modal.cs:line 81
   at Bone.Asp.Render(HtmlTextWriter w) in C:\Bone\Bone\src\Classes\Asp.cs:line 82
   at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)