Copied to clipboard

Flag this post as spam?

This post will be reported to the moderators as potential spam to be looked at


  • Nandakumar P 9 posts 88 karma points
    Apr 12, 2019 @ 09:18
    Nandakumar P
    0

    Unable to open a css in Backoffice

    If I click stylesheet i'm getting a this type of error.

    × Server error: Contact administrator, see log for full details. Failed to retrieve data for child nodes undefined × {"errorMsg":"Failed to retrieve data for child nodes undefined","data":{"Message":"An error has occurred.","ExceptionMessage":"Object reference not set to an instance of an object.","ExceptionType":"System.NullReferenceException","StackTrace":" at umbraco.loadStylesheets.Render(XmlTree& tree)\r\n at Umbraco.Web.Trees.ApplicationTreeExtensions.TryGetXmlTree(ApplicationTree appTree, String id, FormDataCollection formCollection)\r\n at Umbraco.Web.Trees.ApplicationTreeExtensions.TryLoadFromLegacyTree(ApplicationTree appTree, String id, FormDataCollection formCollection, UrlHelper urlHelper, String currentSection)\r\n at Umbraco.Web.Trees.LegacyTreeController.GetTreeNodes(String id, FormDataCollection queryStrings)\r\n at Umbraco.Web.Trees.TreeControllerBase.GetNodes(String id, FormDataCollection queryStrings)\r\n at lambda_method(Closure , Object , Object[] )\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>cDisplayClass10.9(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.

  • Steve Morgan 1184 posts 3830 karma points c-trib
    Aug 05, 2020 @ 14:52
    Steve Morgan
    0

    Old thread but I had the error.

    Check your css folder - if there are files there without .css as an extension (client likes to "backup" the css file) then it might break the backend.

Please Sign in or register to post replies

Write your reply to:

Draft