Hi, Maybe you changed an existing data type for a field in the document type, so if you view the content node of that document type say blog page you may get that error. Better to remove that changed field and save the document type and check if the error is gone. Then create once again the same field with a different alias name. Hop that will work.

HI, Were you trying to create the articles(content node) programmatically? If some wrong data is added to fields via code, there might be an error like this when viewing that node from backoffice.

Could you share any screenshot of any article and its document type to get a better idea? And could you let me know what was the last change made to that error occurred article, I mean to which field?

Hi' Tomas

Did you get the solution?

I am facing same issue while save and publish. Can someone help on this. How can I debug or find out for which exact data its failing ?

I am using below code for save and publish.

public class WebApiHandler : DelegatingHandler
{
    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        if (request.RequestUri.AbsolutePath.ToLower() == "/umbraco/backoffice/umbracoapi/content/postsave")
        {
            return base.SendAsync(request, cancellationToken)
                .ContinueWith(task =>
                {
                    var response = task.Result;
                    try
                    {
                        var data = response.Content;
                        var content = ((ObjectContent)(data)).Value as ContentItemDisplay;
                        if ((bool)content?.ContentTypeAlias?.Equals(DocTypes.RBStarterKitCampaignPage.Alias))
                        {
                            //there is already a campaign page so publishing has been cancelled
                            if (content.Notifications.Count > 0)
                            {
                                foreach (var notification in content.Notifications)
                                {
                                    if (notification.Header.Equals("Publish") && notification.Message.ToLower().Contains("publishing was cancelled"))
                                    {
                                        var campaignMaxCountPerMarket =  ConfigurationManager.AppSettings.Get(AppSettingKeys.CampaignMaxCountPerMarket);

                                        var message = ResxMessages.Get(ResxMessages.BackOffice_MultipleCampaignPage_Error);
                                        var parts = message.Split(new char[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
                                        //change the default notification to our custom message
                                        notification.Header = (parts.Length > 1) ? parts[0] : "Publish";
                                        notification.Message = (parts.Length > 1) ? string.Format(parts[1], campaignMaxCountPerMarket) : string.Format(message, campaignMaxCountPerMarket);
                                      //  notification.NotificationType = SpeechBubbleIcon.Warning;
                                    }
                                }
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        Current.Logger.Error<WebApiHandler>("Error changing custom publishing cancelled message.", ex);
                    }
                    return response;
                }, cancellationToken);
        }

        return base.SendAsync(request, cancellationToken);
    }
}

Great thanks !

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