System.AggregateException: One or more errors occurred. (String "1213" is not a valid udi.)
 ---> System.FormatException: String "1213" is not a valid udi.
   at Umbraco.Cms.Core.UdiParser.ParseInternal(String s, Boolean tryParse, Boolean knownTypes, Udi& udi)
   at Umbraco.Cms.Core.UdiParser.Parse(String s)
   at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
   at Umbraco.Cms.Core.PropertyEditors.ValueConverters.MediaPickerValueConverter.ConvertSourceToIntermediate(IPublishedElement owner, IPublishedPropertyType propertyType, Object source, Boolean preview)
   at Umbraco.Cms.Core.Models.PublishedContent.PublishedPropertyType.ConvertSourceToInter(IPublishedElement owner, Object source, Boolean preview)
   at Our.Umbraco.DocTypeGridEditor.Models.DetachedPublishedProperty.<.ctor>b__7_0()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at Our.Umbraco.DocTypeGridEditor.Models.DetachedPublishedProperty.<.ctor>b__7_1()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at Our.Umbraco.DocTypeGridEditor.Models.DetachedPublishedProperty.get_Value()
   at Our.Umbraco.DocTypeGridEditor.Models.DetachedPublishedProperty.GetValue(String culture, String segment)
   at Umbraco.Extensions.PublishedPropertyExtension.Value[T](IPublishedProperty property, IPublishedValueFallback publishedValueFallback, String culture, String segment, Fallback fallback, T defaultValue)
   at Umbraco.Extensions.PublishedElementExtensions.Value[T](IPublishedElement content, IPublishedValueFallback publishedValueFallback, String alias, String culture, String segment, Fallback fallback, T defaultValue)
   at Umbraco.Cms.Web.Common.PublishedModels.Gallery.get_Photos() in D:\Dev\Web\Rønne Havn\RoenneHavn.Web\umbraco\models\Gallery.generated.cs:line 72
   at AspNetCore.Views_Partials_Grid_Editors_DocTypeGridEditor_gallery.ExecuteAsync() in E:\sites\roennehavn_staging\Views\Partials\Grid\Editors\DocTypeGridEditor\gallery.cshtml:line 19
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.ViewViewComponentResult.ExecuteAsync(ViewComponentContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.InvokeAsync(ViewComponentContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentHelper.InvokeCoreAsync(ViewComponentDescriptor descriptor, Object arguments)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at Our.Umbraco.DocTypeGridEditor.Helpers.DocTypeGridEditorHelper.RenderDocTypeGridEditorItem(IViewComponentHelper helper, IHtmlHelper htmlHelper, IPublishedElement content, String editorAlias, String viewPath, String previewViewPath, Boolean isPreview)
   at Our.Umbraco.DocTypeGridEditor.Helpers.DocTypeGridEditorHelper.RenderDocTypeGridEditorItem(IViewComponentHelper helper, IHtmlHelper htmlHelper, Object model)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute4[T0,T1,T2,T3,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at AspNetCoreGeneratedDocument.App_Plugins_DocTypeGridEditor_Render_DocTypeGridEditor.ExecuteAsync()
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
   at AspNetCore.Views_Partials_grid_editors_base.ExecuteAsync() in E:\sites\roennehavn_staging\Views\Partials\grid\editors\base.cshtml:line 22