SharePoint 2013 Document Set View is not visible

Hi Guys,

I ran into this problem on one of my customers environment, if you create a document set within a library the DocumentView within Document Set was not visible:

I did a lot of checks and finally ran acroos this blogpost!!

http://www.eliostruyf.com/document-set-view-not-visible-in-sharepoint-2013/

So the first thing i checked was if i get the same java script error like him. To check this enable the Developer Tools within IE (F12) and reload page

and yes i got the same error!

So my conclusion was that something is wrong with the customized masterpage, after we did some checks we saw that the PlaceHolder

PlaceHolderPageTitleInTitleArea was commented out.

After we changed this to: (also please ensure that visibility property of this placeholder is removed. If it is set to false, it is also not working)

<div style="display:none">
 <asp:ContentPlaceHolder id="PlaceHolderPageTitleInTitleArea" runat="server" />
</div>

It started to work again:

cheers