It is about 2 days when myself as full control and my users try to upload a document to SharePoint 2013 assets library this error popup for them

The content type “Document Collection Folder” at “…” is sealed.

I searched and I activated the "Video and Rich Media" feature in site collection level but it didn't change.

It is very important and critical, so I appreciate if anyone can help regarding this issue.

  • Have you tried deleting and recreating the asset library you're trying to upload content to? Feb 25, 2016 at 11:52
  • Yes I activates the rich media feature and recreated the library but still I have error while try to add new film with New Document button. something strange that I recently notices is that I have "Add new Document " at top of my library but if it is assets library I should have "Add New Item"?!!!
    – Shaghayegh
    Feb 25, 2016 at 13:30

2 Answers 2


I reached the answer my self and after activating "Rich Video" and "Doc Set " feature and recreating the Library it got solve. Thanks


I confirm you must:

  1. Delete the library "Asset Library".
  2. Activate the 2 Site Collection features: Document Sets, Video and Rich Media.
  3. Create a new "Asset Library".
  4. Re-upload files.

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