Could you verify that you are using the content provider from this KB article, or you have implemented a custom one? Basically, I can think of two possible reasons causing such a behavior:
- the FileExplorer's UploadPaths are not configured properly and the control does not have enough permissions to upload/create files/folders in the current location. Please, ensure the the path to the desired folder (or to a parent one) is listed among the values of the paths in the UploadPaths property:
- The controls does not have enough permissions to modify the items (files and folders) in the used database.
You may also find useful the following help article: Troubleshooting
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