I'm having this problem where I'm creating a document set, and the New Document button is greyed out. I've searched the internet for answers, and I've tried them all:

  • Activating Client Integration -> was already activated, deactivating and reactivating didn't solve the problem.

  • Enabling content type management -> was already enabled, disabling and reenabling didn't solve.

  • Disabling UAC -> Major WTF of a solution. Tried anyway, didn't work.

  • Adding and removing different content types to the library. Didn't work. I even set it to accept all content types. Still didn't work.

  • I've also checked for any code that might be forcing the button to be disabled. There is none.

BTW I'm an admin and my permissions are set for full control.

1 Answer 1


Try clearing the web application blob cache with powershell

More details here: http://www.sharepointdiscussion.com/forum/yaf_postst504_UserAgent-not-available--file-operations-may-not-be-optimized-SharePoint-2013-error.aspx

  • I do not find anything on that link explaining why this could help getting the New Document icon to be enabled. Can you please explain? :) Commented May 30, 2013 at 11:08
  • i checked ULS and found this error: "UserAgent not available, file operations may not be optimized" whenever I'm opening the docset so I tried that and worked. Commented May 30, 2013 at 11:33
  • 1
    Oh in addition - if you're also using custom masterpage, it might be conflicting with the docsethomepage.aspx when opening the docset Commented May 30, 2013 at 11:35
  • The answer was your last comment. After a lot of javascript debugging I found out that the site style is removing a tag that Sharepoint is looking for. Thanks!
    – Geeky Guy
    Commented Jun 25, 2013 at 12:24

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