CKFinder.Connector.ConnectorException when uploading file in ASP.NET project

Question

I have taken over an ASP.NET MVC3 project which incorporates ckfinder with ckeditor. This application has been in production for several years and has been fully functional.

It was migrated to a new server and now I am receiving the following exception when attempting to upload a file using ckfinder:

Server Error in '/' Application.

Exception of type 'CKFinder.Connector.ConnectorException' was thrown. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: CKFinder.Connector.ConnectorException: Exception of type 'CKFinder.Connector.ConnectorException' was thrown.

Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ConnectorException: Exception of type 'CKFinder.Connector.ConnectorException' was thrown.]
CKFinder.Connector.Connector.OnLoad(EventArgs e) +1378
System.Web.UI.Control.LoadRecursive() +54
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34248

I am able to browse the server using ckfinder and add a link to an existing file, rename, and delete files, however, I get this exception when trying to upload a new file. The config.ascx file is configured correctly and I have granted full permissions to Everyone on all related directories. I have googled this exception and there is very little information about it. Any help is appreciated.

Answer 1

Solution:

After digging, I was able to find the following xml response:

<Connector resourceType="Files"><Error number="12"/></Connector>

Using fiddler, I was able to get the full request:

 /scripts/ckfinder/core/connector/aspx/connector.aspx?command=QuickUpload&type=Files&CKEditor=EventText&CKEditorFuncNum=2&langCode=en HTTP/1.1

Here we can see that type=Files is added to the querystring. Reading the config.ascx comments, I saw that this querystring param selects the Resource Type. My resource types included UserFiles, Images, and Flash, but no Files.

I renamed the UserFiles resource type to Files and everything is now working as expected.